Alkyl ether derivatives or salts thereof

ABSTRACT

An alkyl ether represented by the general formula: 
                         
or its salt. This compound has activity to protect neurons, activity to accelerate nerve regeneration and activity to accelerate neurite extension and hence is useful as a therapeutic agent for diseases in central and peripheral nerves.

TECHNICAL FIELD

The present invention relates to novel alkyl ether derivatives or theirsalts, a process for production thereof, intermediates thereof and atherapeutic agent for central and peripheral nerves.

BACKGROUND ART

Dementia is divided into cerebrovascular dementia and neurodegenerativedementia, and various agents such as cerebral blood flow improvers andnootropics are used for treating these dementias.

Senile plaques characteristic of Alzheimer's disease, which is mosttypical as neurodegenerative dementia, are mainly composed of amyloid βprotein (Aβ) derived from β amyloid precursor protein. Aβ is consideredas a substance that is deposited on the neurons or blood vessels ofbrain to cause a disease such as dementia. In addition, it has beenreported that Aβ itself injures neurons. Inhibitors of neurotoxicityinduced by Aβ are investigated as therapeutic agents for Alzheimer'sdisease.

As compounds having inhibitory activity against neurotoxicity induced byAβ, there are known, for example, the 1,2-ethanediol derivativesdisclosed in JP-A-3-232830 and JP-A-4-95070, and theN-alkoxyalkyl-N,N-dialkylamine derivatives disclosed in InternationalPublication WO 00/76957.

The 1,2-ethanediol derivatives disclosed in JP-A-3-232830 andJP-A-4-95070, in particular,(R)-1-(benzo[b]thiophen-5-yl)-2-[2-(N,N-diethylamino)-ethoxy]ethanolhydrochloride has protective activity against the neuronal death causedby Aβ (SOCIETY FOR NEUROSCIENCE, Abstracts, Vol. 24, Part 1, p. 228,1998) and activity to enhance the activity of nerve growth factor (NGF)(WO 96/12717) and hence is useful as a therapeutic agent for diseases incentral and peripheral nerves. However, there is desired the developmentof a compound possessing properties such as a higher activity to protectneurons and a higher activity to accelerate nerve regeneration, whichare required as a therapeutic agent for diseases in central andperipheral nerves.

DISCLOSURE OF THE INVENTION

The present inventors earnestly investigated in order to solve the aboveproblem, and consequently found that there are compounds having not onlycalcium-antagonistic activity but also inhibitory activity againstneurotoxicity induced by Aβ, among the alkyl ether derivatives withcalcium-antagonistic activity disclosed in WO 99/31056.

The present inventors further investigated, and consequently found thatan alkyl ether derivative represented by the following general formula[1]:

wherein each of R¹ and R², which may be the same or different,represents one or more groups selected from a hydrogen atom, a halogenatom, a substituted or unsubstituted alkyl, aryl, aralkyl, alkoxy,aryloxy, alkylthio, arylthio, alkenyl, alkenyloxy, amino, alkylsulfonyl,arylsulfonyl, carbamoyl or heterocyclic group, a protected orunprotected amino, hydroxyl or carboxyl group, a nitro group, and an oxogroup; R³ is a substituted or unsubstituted alkylamino group, or aprotected or unprotected amino or hydroxyl group; the ring A is a5-membered or 6-membered heteroaromatic ring or a benzene ring; each ofm and n is an integer of 1 to 6; and p is an integer of 1 to 3, or itssalt has activity to protect neurons, activity to accelerate nerveregeneration and activity to accelerate axon extension, is excellent instability to metabolism, and is useful as a therapeutic agent fordiseases in central and peripheral nerves, whereby the present inventionhas been accomplished.

The present invention is explained below in detail.

The terms used in the present specification have the following meaningsunless otherwise specified. The term “halogen atom” means a fluorineatom, a chlorine atom, a bromine atom or an iodine atom; the term “alkylgroup” means a straight chain or branched chain C₁₋₁₂alkyl group such asmethyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl,hexyl, heptyl, octyl or the like; the term “lower alkyl group” means astraight chain or branched chain C₁₋₆alkyl group such as methyl, ethyl,propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl or thelike; the term “alkoxy group” means a straight chain or branched chainC₁₋₁₂alkyloxy group such as methoxy, ethoxy, propoxy, isopropoxy,butoxy, isobutoxy, tert-butoxy, pentyloxy, hexyloxy, heptyloxy, octyloxyor the like; the term “lower alkoxy group” means a straight chain orbranched chain C₁₋₆alkyloxy group such as methoxy, ethoxy, propoxy,isopropoxy, butoxy, isobutoxy, tert-butoxy, pentyloxy, hexyloxy or thelike; the term “alkenyl group” means a C₂₋₁₂alkenyl group such as vinyl,propenyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl or the like; theterm “lower alkenyl group” means a C₂₋₆alkenyl group such as vinyl,propenyl, butenyl, pentenyl, hexenyl or the like; the term “alkenyloxygroup” means a C₂₋₁₂alkenyloxy group such as vinyloxy, propenyloxy,butenyloxy, pentenyloxy, hexenyloxy heptenyloxy, octenyloxy or the like;the term “lower alkenyloxy group” means a C₂₋₆alkenyloxy group such asvinyloxy, propenyloxy, butenyloxy, pentenyloxy, hexenyloxy or the like;the term “alkynyl group” means a C₂₋₆alkynyl group such as ethynyl,2-propynyl, 2-bytynyl or the like; the term “cycloalkyl group” means acyclopropyl, cyclobutyl, cyclopentyl or cyclohexyl group; the term“alkylthio group” means a C₁₋₁₂alkylthio group such as methylthio,ethylthio, propylthio, isopropylthio, butylthio, isobutylthio,tert-butylthio, pentylthio, hexylthio, heptylthio, octylthio or thelike; the term “lower alkylthio group” means a C₁₋₆alkylthio group suchas methylthio, ethylthio, propylthio, isopropylthio, butylthio,isobutylthio, tert-butylthio, pentylthio, hexylthio or the like; theterm “aryl group” means a phenyl, naphthyl, indanyl or indenyl group;the term “aryloxy group” means a phenyloxy, naphthyloxy, indanyloxy orindenyloxy group; the term “aralkyl group” means an ar-C₁₋₆alkyl groupsuch as benzyl, diphenylmethyl, trityl, phenethyl or the like; the term“arylthio group” means a phenylthio, naphthylthio, indanylthio orindenylthio group; the term “acyl group” means a formyl group, aC₂₋₁₂alkanoyl group such as acetyl, isovaleryl, propionyl, pivaloyl orthe like, an aralkylcarbonyl group such as benzylcarbonyl or the like,or an aroyl group such as benzoyl, naphthoyl or the like; the term“alkylsulfonyl group” means a C₁₋₁₂alkylsulfonyl group such asmethylsulfonyl, ethylsulfonyl, propylsulfonyl, isopropylsulfonyl,butylsulfonyl, isobutylsulfonyl, sec-butylsulfonyl, tert-butylsulfonyl,pentylsulfonyl, hexylsulfonyl, heptylsulfonyl, octylsulfonyl or thelike; the term “lower alkylsulfonyl group” means a C₁₋₆alkylsulfonylgroup such as methylsulfonyl, ethylsulfonyl, propylsulfonyl,isopropylsulfonyl, butylsulfonyl, isobutylsulfonyl, sec-butylsulfonyl,tert-butylsulfonyl, pentylsulfonyl or the like; the term “arylsulfonylgroup” means a phenylsulfonyl, p-toluenesulfonyl or naphthylsulfonylgroup or the like; the term “lower alkylsulfonyloxy group” means aC₁₋₆alkylsulfonyloxy group such as methylsulfonyloxy, ethylsulfonyloxy,propylsulfonyloxy, isopropylsulfonyloxy, butylsulfonyloxy,isobutylsulfonyloxy, sec-butylsulfonyloxy, tert-butylsulfonyloxy,pentylsulfonyloxy or the like; the term “arylsulfonyloxy group” means aphenylsulfonyloxy, p-toluenesulfonyloxy or naphthylsulfonyloxy group orthe like; the term “alkylamino group” means a mono- or di-C₁₋₆alkylaminogroup such as a methylamino, ethylamino, propylamino, isopropylamino,butylamino, dimethylamino, diethylamino, diisopropylamino, dibutylaminoor the like; the term “monoalkylamino group” means a mono-C₁₋₆alkylaminogroup such as methylamino, ethylamino, propylamino, isopropylamino,butylamino or the like; the term “dialkylamino group” means adi-C₁₋₆alkylamino group such as dimethylamino, diethylamino,diisopropylamino, dibutylamino or the like; the term “heterocyclicgroup” means a 5-membered or 6-membered heterocyclic group containing atleast one heteroatom selected from nitrogen, oxygen and sulfur atoms ora condensed or crosslinked heterocyclic group thereof, such aspyrrolidinyl, piperidinyl, piperazinyl, homopiperazinyl,homopiperidinyl, morpholyl, thiomorpholyl, tetrahydroquinolyl,tetrahydroisoquinolyl, quinuclidinyl, imidazolinyl, pyrrolyl,imidazolyl, pyrazolyl, pyridyl, pyrimidyl, quinolyl, quinolizinyl,thiazolyl, tetrazolyl, thiadiazolyl, pyrrolinyl, pyrazolinyl,pyrazolidinyl, purinyl, furyl, thienyl, benzothienyl, pyranyl,isobenzofuranyl, oxazolyl, isoxazolyl, benzofuranyl, indolyl,benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl,quinoxalyl, dihydroquinoxalyl, 2,3-dihydrobenzothienyl,2,3-dihydrobenzopyrrolyl, 2,3-4H-1-thianaphthyl,2,3-dihydrobenzofuranyl, benzo[b]dioxanyl, imidazo[2,3-a]pyridyl,benzo[b]piperazinyl, chromenyl, isothiazolyl, isoxazolyl, oxadiazolyl,pyridazinyl, isoindolyl, isoquinolyl, 1,3-benzodioxonyl,1,4-benzodioxanyl or the like; and the term “cyclic amino group” means a5-membered, 6-membered or 7-membered cyclic amino group which containsone or more nitrogen atoms as the heteroatoms forming the ring and mayfurther contain one or more oxygen atoms or sulfur atoms or a condensedor crosslinked cyclic amino group thereof, such as pyrrolidinyl,piperidinyl, piperazinyl, homopiperazinyl, homopiperidinyl, morpholyl,thiomorpholyl, tetrahydroquinolyl, tetrahydroisoquinolyl, imidazolidinylor the like.

As the 5-membered or 6-membered heteroaromatic ring as the ring A, thereare exemplified 5-membered or 6-membered heteroaromatic rings whichcontain at least one heteroatom selected from oxygen, nitrogen andsulfur atoms as the heteroatom forming the ring, such as triazine,pyridazine, pyrimidine, pyrazine, pyridine, furan, thiophene, pyrrole,oxazole, thiazole, imidazole, isoxazole, isothiazole, pyrazole, pyran,and the like.

As the substituent of each of the alkyl group, aryl group, aralkylgroup, alkoxy group, aryloxy group, alkylthio group, arylthio group,alkenyl group, alkenyloxy group, amino group, alkylsulfonyl group,arylsulfonyl group, carbamoyl group and heterocyclic group for each ofR¹ and R² and the alkylamino group for R³, there are exemplified groupsselected from halogen atoms, lower alkyl groups, cycloalkyl groups, arylgroups, lower alkoxy groups, aryloxy groups, lower alkylthio groups,arylthio groups, lower alkenyl groups, lower alkylsulfonyl groups,arylsulfonyl groups, alkylamino groups, protected or unprotected aminogroups, protected or unprotected hydroxyl groups, protected orunprotected carboxyl groups, acyl groups, heterocyclic groups, etc.

The protecting group for the carboxyl group includes all conventionalgroups usable as carboxyl-protecting groups, for example, lower alkylgroups such as methyl, ethyl, propyl, isopropyl, 1,1-dimethylpropyl,butyl, tert-butyl and the like; aryl groups such as phenyl, naphthyl andthe like; ar-lower alkyl groups such as benzyl, diphenylmethyl, trityl,4-nitrobenzyl, 4-methoxybenzyl, bis(4-methoxyphenyl)-methyl and thelike; acyl-lower alkyl groups such as acetylmethyl, benzoylmethyl,4-nitrobenzoylmethyl, 4-bromobenzoylmethyl,4-methanesulfonylbenzoylmethyl and the like; oxygen-containingheterocyclic groups such as 2-tetrahydropyranyl, 2-tetrahydrofuranyl andthe like; halogeno-lower alkyl groups such as 2,2,2-trichloroethyl andthe like; lower alkylsilyl-lower alkyl groups such as2-(trimethylsilyl)ethyl and the like; acyloxy-lower alkyl groups such asacetoxymethyl, propionyloxymethyl, pivaloyloxymethyl and the like;nitrogen-containing heterocyclic lower alkyl groups such asphthalimidomethyl, succinimidomethyl and the like; cycloalkyl groupssuch as cyclohexyl and the like; lower alkoxy-lower alkyl groups such asmethoxymethyl, methoxyethoxymethyl, 2-(trimethylsilyl)-ethoxymethyl andthe like; ar-lower alkoxy-lower alkyl groups such as benzyloxymethyl andthe like; lower alkylthio-lower alkyl groups such as methylthiomethyl,2-methylthioethyl and the like; arylthio-lower alkyl groups such asphenylthiomethyl and the like; lower alkenyl groups such as1,1-dimethyl-2-propenyl, 3-methyl-3-butenyl, allyl and the like; andsubstituted silyl groups such as trimethylsilyl, triethylsilyl,triisopropylsilyl, diethylisopropylsilyl, tert-butyldimethylsilyl,tert-butyldiphenylsilyl, diphenylmethylsilyl,tert-butylmethoxyphenylsilyl and the like.

The protecting group for the hydroxyl group includes all conventionalgroups usable as hydroxyl-protecting groups, for example, alkoxy- andalkylthiocarbonyl groups such as benzyloxycarbonyl,4-nitrobenzyloxycarbonyl, 4-bromobenzyloxycarbonyl,4-methoxybenzyloxycarbonyl, 3,4-dimethoxybenzyloxycarbonyl,methoxycarbonyl, ethoxycarbonyl, tert-butoxycarbonyl,1,1-dimethylpropoxycarbonyl, isopropoxycarbonyl, isobutyloxycarbonyl,diphenylmethoxycarbonyl, 2,2,2-trichloroethoxycarbonyl,2,2,2-tribromoethoxycarbonyl, 2-(trimethylsilyl)ethoxycarbonyl,2-(phenylsulfonyl)ethoxycarbonyl, 2-(triphenylphosphonio)ethoxycarbonyl,2-furfuryloxycarbonyl, 1-adamantyloxycarbonyl, vinyloxycarbonyl,allyloxycarbonyl, 4-ethoxy-1-naphthyloxycarbonyl, 8-quinolyloxycarbonyl,S-benzylthiocarbonyl and the like; acyl groups such as acetyl, formyl,chloroacetyl, dichloroacetyl, trichloroacetyl, trifluoroacetyl,methoxyacetyl, phenoxyacetyl, pivaloyl, benzoyl and the like; loweralkyl groups such as methyl, tert-butyl, 2,2,2-trichloroethyl,2-trimethylsilylethyl and the like; lower alkenyl groups such as allyland the like; lower alkynyl groups such as propargyl and the like;ar-lower alkyl groups such as benzyl, 4-methoxybenzyl,3,4-dimethoxybenzyl, diphenylmethyl, trityl and the like;oxygen-containing or sulfur-containing heterocyclic groups such astetrahydrofuryl, tetrahydropyranyl, tetrahydrothiopyranyl and the like;lower alkoxy- or lower alkylthio-lower alkyl groups such asmethoxymethyl, methylthiomethyl, benzyloxymethyl, 2-methoxyethoxymethyl,2,2,2-trichloroethoxymethyl, 2-(trimethylsilyl)ethoxymethyl,1-ethoxyethyl, 1-methyl-1-methoxyethyl and the like; lower alkyl- oraryl-sulfonyl groups such as methanesulfonyl, p-toluenesulfonyl and thelike; and substituted silyl groups such as trimethylsilyl,triethylsilyl, triisopropylsilyl, diethylisopropylsilyl,tert-butyldimethylsilyl, tert-butyldiphenylsilyl, diphenylmethylsilyl,tert-butylmethoxyphenylsilyl and the like.

The protecting group for the amino group includes all conventionalgroups usable as amino-protecting groups, for example, alkoxycarbonylgroups such as methoxycarbonyl, 2,2,2-trichloroethoxycarbonyl,2,2,2-tribromoethoxycarbonyl, 2-trimethylsilylethoxycarbonyl,1,1-dimethylpropoxycarbonyl, tert-butoxycarbonyl, vinyloxycarbonyl,allyloxycarbonyl, 1-adamantyloxycarbonyl, benzyloxycarbonyl,4-nitrobenzyloxycarbonyl, 2-bromobenzyloxycarbonyl,4-methoxybenzyloxycarbonyl, 2,4-dichlorobenzyloxycarbonyl,diphenylmethoxycarbonyl, 4-(phenylazo)benzyloxycarbonyl,2-furfuryloxycarbonyl, 8-quinolyloxycarbonyl and the like; acyl groupssuch as (mono-, di- or tri-)chloroacetyl, trifluoroacetyl, phenylacetyl,formyl, acetyl, benzoyl, phthaloyl, succinyl, alanyl, leucyl and thelike; ar-lower alkyl groups such as benzyl, diphenylmethyl, trityl andthe like; arylthio groups such as 2-nitrophenylthio,2,4-dinitrophenylthio and the like; alkyl- or aryl-sulfonyl groups suchas methanesulfonyl, p-toluenesulfonyl and the like; di-loweralkylamino-lower alkylidene groups such as N,N-dimethylaminomethyleneand the like; ar-lower alkylidene groups such as benzylidene,2-hydroxybenzylidene, 2-hydroxy-5-chlorobenzylidene,2-hydroxy-1-naphthylmethylene and the like; nitrogen-containingheterocyclic alkylidene groups such as 3-hydroxy-4-pyridylmethylene andthe like; cycloalkylidene groups such as cyclohexylidene,2-ethoxycarbonylcyclohexylidene, 2-ethoxycarbonylcyclopentylidene,2-acetylcyclohexylidene, 3,3-dimethyl-5-oxycyclohexylidene and the like;diaryl- or diar-lower alkylphosphoryl groups such as diphenylphosphoryl,dibenzylphosphoryl and the like; oxygen-containing heterocyclic alkylgroups such as 5-methyl-2-oxo-2H-1,3-dioxol-4-yl-methyl and the like;and substituted silyl groups such as trimethylsilyl and the like.

The salt of the compound of the general formula [1] includes usuallyknown salts at basic groups such as amino group and the like and saltsat acidic groups such as hydroxyl group, carboxyl group and the like.

The salts at the basic groups include, for example, salts with mineralacids such as hydrochloric acid, hydrobromic acid, nitric acid, sulfuricacid and the like; salts with organic carboxylic acids such as formicacid, acetic acid, citric acid, oxalic acid, fumaric acid, maleic acid,succinic acid, malic acid, tartaric acid, aspartic acid, trichloroaceticacid, trifluoroacetic acid and the like; and salts with sulfonic acidssuch as methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonicacid, mesitylenesulfonic acid, naphthalenesulfonic acid and the like.

The salts at the acidic groups include, for example, salts with alkalimetals such as sodium, potassium and the like; salts with alkaline earthmetals such as calcium, magnesium and the like; ammonium salts; andsalts with nitrogen-containing organic bases such as trimethylamine,triethylamine, tributylamine, pyridine, N,N-dimethylaniline,N-methylpiperidine, N-methylmorpholine, diethylamine, dicyclohexylamine,procaine, dibenzylamine, N-benzyl-β-phenethylamine, 1-ephenamine,N,N′-dibenzylethylenediamine and the like.

Of the above-exemplified salts, preferable salts are pharmacologicallyacceptable salts.

When the alkyl ether derivative of the general formula [1] or its salthas isomers (for example, optical isomers, geometrical isomers andtautomers), the present invention includes all of these isomers, and thederivative or its salt may be in the form of a hydrate or solvate or inany crystal form.

Preferable examples of the alkyl ether derivative of the general formula[1] or salt thereof of the present invention are compounds of thegeneral formula [1] in which the portion represented by

is any of the following:

Of such compounds, preferable examples of the derivative or salt thereofof the present invention are compounds in which R¹ is a hydrogen atom;and R² is a hydrogen atom, a halogen atom or an alkoxy group.

In addition, compounds of the general formula [1] in which m=2 and n=2˜3are preferable. Of such compounds, compounds of the general formula [1]in which p=1˜2 are more preferable.

The most preferable examples of the derivative or salt thereof of thepresent invention are compounds in which each of R¹ and R² in the abovegroup (A) is a hydrogen atom; R³ is a hydroxyl group; m=2; n=3; and p=1.

Processes for producing the alkyl ether derivative of the generalformula [1] or its salt are explained below.

The alkyl ether derivative of the general formula [1] or its salt can beproduced, for example, by any of the following production processes byadopting one or a proper combination of per se well-known methods.

wherein R¹, R², R³, A, m, n and p are as defined above; R^(3a) is adialkylamino group, a protected monoalkylamino group, a protected aminogroup or a protected or unprotected hydroxyl group; R^(3b) is adialkylamino group, a protected monoalkylamino group, a protected aminogroup or a protected hydroxyl group; R^(3c) is a protected hydroxylgroup; R^(3d) is a monoalkylamino group, an amino group or a hydroxylgroup; and each of X¹, X² and X³ is a leaving group.

The leaving group includes, for example, halogen atoms, loweralkylsulfonyloxy groups and arylsulfonyloxy groups.

The individual production processes are explained below.

Production Process 1.

-   (1-1) A compound of the general formula [4] can be produced by    reacting a compound of the general formula [2] or its reactive    derivative with a compound of the general formula [3].

This reaction may be carried out by a per se well-known method, forexample, the method described in Japanese Chemical Association, “JikkenKagaku Koza” vol. 22, pages 137–173 (1992), Maruzen Co., Ltd. or amethod based thereon.

The reactive derivative of the compound of the general formula [2]includes, for example, acid halides, acid anhydrides, activated amidesand activated esters.

When the compound of the general formula [2] is used in the form of afree acid, the reaction is preferably carried out in the presence of acondensing agent.

The condensing agent includes, for example, N,N′-dialkylcarbodiimidessuch as N,N′-dicyclohexyl-carbodiimide and the like; halogenating agentssuch as thionyl chloride, oxalyl chloride and the like; acid halidessuch as ethoxycarbonyl chloride and the like; agents for conversion toan activated amide, such as carbonyldiimidazole and the like; and agentfor conversion to an azide, such as diphenylphosphoryl azide and thelike.

The amount of the condensing agent used is 1 mole or more, preferably 1to 5 moles, per mole of the compound of the general formula [2].

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, water; halogenated hydrocarbons such as methylene chloride,chloroform and the like; ethers such as tetrahydro-furan, dioxane andthe like; aromatic hydrocarbons such as benzene, toluene, xylene and thelike; sulfoxides such as dimethyl sulfoxide and the like; amides such asN,N-dimethylformamide and the like; esters such as ethyl acetate and thelike; ketones such as acetone, methyl ethyl ketone and the like;nitrites such as acetonitrile and the like; and heteroaromatic compoundssuch as pyridine and the like. These solvents may be used singly or as amixture thereof.

The reaction may be carried out in the presence of a base.

The base includes, for example, organic or inorganic bases such astriethylamine, diisopropylethylamine, 1,8-diazabicyclo[5,4,0]undec-7-ene(DBU), pyridine, potassium tert-butoxide, sodium carbonate, sodiumhydrogencarbonate, potassium carbonate, sodium hydroxide and the like.

The amount of the base used is 0.5 mole or more, preferably 1 to 10moles, per mole of the compound of the general formula [2].

The amount of the compound of the general formula [3] is 1 mole or more,preferably 1 to 20 moles, per mole of the compound of the generalformula [2].

The reaction is carried out at usually −100° C. to 200° C., preferably−60° C. to 100° C., for 10 minutes to 20 hours.

The compound of the general formula [4] obtained may be used as it is inthe subsequent reaction without isolation.

-   (1-2) When R^(3a) is an unprotected hydroxyl group in the compound    of the general formula [4], this compound can be converted to a    compound of the general formula [4a] by subjecting it to a    conventional reaction for protecting the hydroxyl group.

This reaction may be carried out by a per se well-known method, forexample, the method described in Theodora W. Green, “Protective Groupsin Organic Synthesis” pages 10–118 (1991), John Wiley & Sons. Inc., or amethod based thereon.

A compound used in the reaction for protecting the hydroxyl groupincludes, for example, acid anhydrides such as acetic anhydride and thelike; acid halides such as benzoyl chloride, pivaloyl chloride,methoxycarbonyl chloride, ethoxycarbonyl chloride and the like; halidessuch as methoxymethyl chloride, benzyloxymethyl chloride, benzylchloride, benzyl bromide, trityl chloride, triethylsilyl chloride andthe like; organic carboxylic acid compounds such as benzoic acid and thelike; dialkoxyalkyl compounds such as dimethoxymethane and the like; andacyclic or cyclic alkoxyvinyl compounds such as 2-methoxypropene,3,4-dihydro-2H-pyran and the like.

The amount of the compound used in the reaction for protecting thehydroxyl group is 1 mole or more, preferably 1 to 2 moles, per mole ofthe compound of the general formula [4a].

The reaction for protecting the hydroxyl group by the use of any of theacid anhydrides, the acid halides and the halides is usually carried outin the presence of a base or a dehalogenating agent. The base usedincludes, for example, organic or inorganic bases such as triethylamine,N,N-diisopropylethylamine, 1,8-diazabicyclo[5,4,0]undec-7-ene (DBU),pyridine, 4-dimethylaminopyridine, potassium tert-butoxide, sodiumhydroxide, potassium hydroxide, sodium hydride and the like. Thedehalogenating agent includes silver compounds such as silver oxide andthe like.

The reaction for protecting the hydroxyl group by the use of the organiccarboxylic acid compound is carried out in the presence of a dehydratingagent. The dehydrating agent used includes, for exampletriphenylphosphine-diisopropyl=azodicarboxylate.

The reaction for protecting the hydroxyl group by the use of any of theacid anhydrides, the dialkoxyalkyl compounds and the acyclic or cyclicalkoxyvinyl compounds is usually carried out in the presence of an acidcatalyst. The acid used includes organic sulfonic acids such asp-toluenesulfonic acid and the like; inorganic acids such ashydrochloric acid, sulfuric acid and the like; and Lewis acids such asboron trifluoride, boron trifluoride diethyl ether complex, borontrifluoride tetrahydrofuran complex and the like.

The amount of the base, dehalogenating agent or dehydrating agent usedin the reaction is 1 mole or more, preferably 1 to 2 moles, per mole ofthe compound used in the reaction for protecting the hydroxyl group. Theamount of the acid used as catalyst is 0.001 to 10 moles, preferably0.01 to 1 mole, per mole of the compound of the general formula [4a].

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, halogenated hydrocarbons such as methylene chloride, chloroformand the like; ethers such as tetrahydrofuran, dioxane and the like;aromatic hydrocarbons such as benzene, toluene, xylene and the like;sulfoxides such as dimethyl sulfoxide and the like; amides such asN,N-dimethylformamide and the like; esters such as ethyl acetate and thelike; ketones such as acetone, methyl ethyl ketone and the like;nitrites such as acetonitrile and the like; and heteroaromatic compoundssuch as pyridine and the like. These solvents may be used singly or as amixture thereof.

The reaction is carried out at usually −100° C. to 200° C., preferably−60° C. to 100° C., for 10 minutes to 30 hours.

The reactants or base used in each of the above production methods maybe used also as a solvent, depending on their properties.

The compound of the general formula [4a] obtained may be used as it isin the subsequent reaction without isolation.

-   (1-3) A compound of the general formula [1] can be produced by    subjecting the compound of the general formula [4] or the general    formula [4a] to a conventional reduction.

This reduction may be carried out by a per se well-known method, forexample, the method described in Japanese Chemical Association, “ShinJikken Kagaku Koza” vol. 15, [II], pages 29–244 (1977), Maruzen Co.,Ltd. or a method based thereon.

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, halogenated hydrocarbons such as methylene chloride, chloroformand the like; ethers such as tetrahydrofuran, dioxane and the like;aromatic hydrocarbons such as benzene, toluene, xylene and the like; andalcohols such as methanol, ethanol, isopropanol and the like. Thesesolvents may be used singly or as a mixture thereof.

As a reducing agent, there are exemplified aluminum hydrides such aslithium aluminum hydride and the like; and boron hydrides such asdiborane, borane-tetrahydrofuran complexes, borane-dimethyl sulfidecomplexes, sodium borohydride and the like.

When sodium borohydride is used as the reducing agent, the reaction ispreferably carried out in the presence of a Lewis acid such as borontrifluoride, boron trifluoride diethyl ether complex, boron trifluoridetetrahydrofuran complex or the like.

The amount of the reducing agent used is 0.2 mole or more, preferably0.5 to 10 moles, per mole of the compound of the general formula [4] orthe general formula [4a].

The amount of the Lewis acid used is 1 mole or more, preferably 4/3 to 2moles, per mole of the reducing agent.

The reaction is carried out at usually −50° C. to 200° C., preferably 0°C. to 110° C., for 10 minutes to 20 hours.

Production Process 2.

A compound of the general formula [1a] can be produced by reacting acompound of the general formula [5] with a compound of the generalformula [3] in the presence or absence of a base.

In this reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, water; halogenated hydrocarbons such as methylene chloride,chloroform and the like; aromatic hydrocarbons such as benzene, toluene,xylene and the like; ethers such as tetrahydrofuran, dioxane and thelike; alcohols such as methanol, ethanol and the like; nitrites such asacetonitrile and the like; amides such as N,N-dimethylformamide and thelike; and sulfoxides such as dimethyl sulfoxide and the like. Thesesolvents may be used singly or as a mixture thereof.

The base optionally used includes, for example, organic or inorganicbases such as triethylamine, diisopropylethylamine,1,8-diazabicyclo[5,4,0]undec-7-ene (DBU), pyridine, potassiumtert-butoxide, sodium carbonate, sodium hydrogencarbonate, potassiumcarbonate, sodium hydroxide and the like.

The amount of the base used is 0.5 mole or more, preferably 1 to 20moles, per mole of the compound of the general formula [5].

In addition, the reaction may be carried out in the presence of acatalyst.

The catalyst includes, for example, potassium iodide and sodium iodide.

The amount of the catalyst used is 0.01 to 10 moles, preferably 0.1 to 1mole, per mole of the compound of the general formula [5].

The amount of the compound of the general formula [3] used is 1 mole ormore, preferably 1 to 20 moles, per mole of the compound of the generalformula [5].

The reaction is carried out at usually 0° C. to 200° C., preferably 20°C. to 150° C., for 10 minutes to 20 hours.

The reactants or base used in the above production process may be usedalso as a solvent, depending on their properties.

Production Process 3.

A compound of the general formula [1b] can be produced by reacting acompound of the general formula [6] with a compound of the generalformula [7] in the presence of a base.

This reaction may be carried out by a per se well-known method, forexample, the method described in Tetrahedron Letters, vol. 38, pages3251–3254 (1975) and Japanese Chemical Association, “Shin Jikken KagakuKoza” vol. 14, [I], pages 567–611 (1977), Maruzen Co., Ltd. or a methodbased thereon.

The base includes, for example, sodium hydride, sodium hydroxide,potassium hydroxide and potassium tert-butoxide.

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, halogenated hydrocarbons such as methylene chloride, chloroformand the like; ethers such as tetrahydrofuran, dioxane and the like;aromatic hydrocarbons such as benzene, toluene, xylene and the like;sulfoxides such as dimethyl sulfoxide and the like; amides such asN,N-dimethylformamide and the like; and water. These solvents may beused singly or as a mixture thereof.

The reaction may be carried out in the presence or absence of acatalyst.

The catalyst used includes usually known phase transfer catalystscomposed of a quaternary ammonium salt, and preferable examples thereofare tetra-n-butylammonium hydrogensulfate and tetra-n-butylammoniumbromide.

The amount of each of the compound of the general formula [7] and thebase used in the reaction is 1 mole or more, preferably 1 to 20 moles,per mole of the compound of the general formula [6]. The amount of thecatalyst is 0.001 to 1 mole per mole of the compound of the generalformula [6].

The reaction is carried out at usually −50° C. to 200° C., preferably 0°C. to 150° C., for 10 minutes to 20 hours.

Production Process 4.

A compound of the general formula [1b] can be produced by reacting acompound of the general formula [8] with a compound of the generalformula [9] in the presence or absence of a base.

This reaction may be carried out by a per se well-known method, forexample, the same method as in production process 3.

Production Process 5.

-   (5-1) A compound of the general formula [1c] can be produced by    subjecting a compound of the general formula [1a] and a compound of    the general formula [1b] to a conventional deprotecting reaction.

This reaction may be carried out by a per se well-known method, forexample, the method described in Theodora W. Green, “Protective Groupsin organic Synthesis” pages 10–118 and 309–405 (1991), John Wiley &Sons. Inc., or a method based thereon.

The deprotecting reaction is carried out under conditions for, forexample, hydrolysis and transesterification reaction in the presence ofan acid or a base, substitution and elimination reaction in the presenceof an acid catalyst, or hydrogenolysis in the presence of a metalcatalyst. The base used includes, for example, inorganic bases such assodium hydroxide, potassium hydroxide, sodium hydride and the like. Theacid includes organic sulfonic acids such as p-toluenesulfonic acid andthe like; organic carboxylic acids such as formic acid, acetic acid,trifluoroacetic acid and the like; inorganic acids such as hydrochloricacid, sulfuric acid and the like; and Lewis acids such as borontrifluoride, boron trifluoride diethyl ether complex, boron trifluoridetetrahydrofuran complex and the like. The metal catalyst includes, forexample, transition metals such as platinum, palladium,palladium-carbon, palladium hydroxide and the like.

The base used in the reaction may be used in an amount of 1 mole ormore, preferably 1 to 5 moles, per mole of a combination of thecompounds of the general formulas [1a] and [1b]. The amount of the acidused is 1 mole or more, preferably 1.1 to 100 moles, per mole of acombination of the compounds of the general formulas [1a] and [1b]. Theamount of the metal catalyst used is a catalytic amount, preferably 0.01to 30% by weight, relative to a combination of the compounds of thegeneral formulas [1a] and [1b].

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, halogenated hydrocarbons such as methylene chloride, chloroformand the like; ethers such as tetrahydrofuran, dioxane and the like;aromatic hydrocarbons such as benzene, toluene, xylene and the like;sulfoxides such as dimethyl sulfoxide and the like; amides such asN,N-dimethylformamide and the like; esters such as ethyl acetate and thelike; ketones such as acetone, methyl ethyl ketone and the like;nitrites such as acetonitrile and the like; alcohols such as methanol,ethanol and the like; organic carboxylic acids such as formic acid,acetic acid and the like; and water. These solvents may be used singlyor as a mixture thereof.

The reaction is carried out at usually −100° C. to 200° C., preferably−60° C. to 120° C., for 10 minutes to 20 hours.

The acid used in each of the above production methods may be used alsoas a solvent, depending on its properties.

-   (5-2) The compound of the general formula [1c] can be converted to    the compound of the general formula [1b] by subjecting it to any of    conventional reactions for protection of a hydroxyl group and an    amino group and the alkylation of an amino group.

The reaction for protecting a hydroxyl group may be carried out by a perse well-known method, for example, the method described in Theodora W.Green, “Protective Groups in Organic Synthesis” pages 10–118 (1991),John Wiley & Sons. Inc., or a method based thereon, namely, the reactionmay be carried out by the same method as in the above item (1-2).

The reaction for protecting an amino group may be carried out by a perse well-known method, for example, the method described in Theodora W.Green, “Protective Groups in Organic Synthesis” pages 309–405 (1991),John Wiley & Sons. Inc., or a method based thereon.

A compound used in the reaction for protecting an amino group includes,for example, acid anhydrides such as acetic anhydride and the like; andacid halides such as acetyl chloride, benzoyl chloride, mesyl chloride,tosyl chloride and the like. The amount of the compound used is 1 moleor more, preferably 1 to 2 moles, per mole of the compound of thegeneral formula [1c].

This reaction is usually carried out in the presence of a base, and thebase includes, for example, organic or inorganic bases such astriethylamine, diisopropylethylamine, 1,8-diazabicyclo[5,4,0]undec-7-ene(DBU), pyridine, potassium tert-butoxide, sodium carbonate, sodiumhydrogencarbonate, potassium carbonate, sodium hydride and the like.

The amount of the base used is 0.5 mole or more, preferably 1 to 10moles, per mole of the compound of the general formula [1c].

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, halogenated hydrocarbons such as methylene chloride, chloroformand the like; ethers such as tetrahydrofuran, dioxane and the like;aromatic hydrocarbons such as benzene, toluene, xylene and the like;sulfoxides such as dimethyl sulfoxide and the like; amides such asN,N-dimethylformamide and the like; esters such as ethyl acetate and thelike; ketones such as acetone, methyl ethyl ketone and the like;nitrites such as acetonitrile and the like; alcohols such as methanol,ethanol and the like; and water. These solvents may be used singly or asa mixture thereof.

The reaction is carried out at usually −100° C. to 200° C., preferably−60° C. to 100° C., for 10 minutes to 20 hours.

The alkylation of an amino group may be carried out by a per sewell-known method, for example, the method described in JapaneseChemical Association, “Shin Jikken Kagaku Koza” vol. 14, [III], pages1332–1399 (1977), Maruzen Co., Ltd. or a method based thereon.

A compound used in the alkylation of an amino group includes, forexample, carbonyl compounds such as formaldehyde, paraformaldehyde,acetaldehyde, acetone and the like.

The amount of this compound used is 1 mole or more, preferably 1 to 5moles, per mole of the compound of the general formula [1c].

This reaction is usually carried out in the presence of a reducingagent, and the reducing agent includes boron hydrides such as sodiumborohydride and the like.

The amount of the reducing agent used is 0.5 mole or more, preferably 1to 10 moles, per mole of the carbonyl compound.

In the reaction, any solvent may be used so long as it has noundesirable influence on the reaction. The solvent includes, forexample, water; halogenated hydrocarbons such as methylene chloride,chloroform and the like; aromatic hydrocarbons such as benzene, toluene,xylene and the like; ethers such as tetrahydrofuran, dioxane and thelike; and alcohols such as methanol, ethanol and the like. Thesesolvents may be used singly or as a mixture thereof.

The reaction is carried out at usually −100° C. to 200° C., preferably0° C. to 100° C., for 10 minutes to 30 hours.

The reactants used in each of the above production methods may be usedalso as a solvent, depending on their properties.

In the above production processes, each of the compounds of the generalformulas [2] to [9] can be used in the form of a salt. As the salt,there are exemplified the same salts as in the case of the compound ofthe general formula [1]. As salts of the compounds of the generalformulas [1a], [1b] and [1c], there are exemplified the same salts as inthe case of the compound of the general formula [1].

When any of the compounds of the general formulas [1a], [1b], [1c] and[2] to [9] has isomers (for example, optical isomers, geometricalisomers and tautomers), each of these isomers can be used. In addition,any of the compounds may be used in the form of a hydrate or solvate orin any crystal form.

Each of the compounds of the general formulas [1a], [1b], [1c] and [2]to [9] may be used as it is in the subsequent reaction withoutisolation.

When any of the compounds of the general formulas [1], [1a], [1b], [1c]and [2] to [9] has a hydroxyl group, an amino group or a carboxyl group,it is possible to previously protect the hydroxyl group, the amino groupor the carboxyl group with a conventional protecting group and, ifnecessary, remove the protecting group by a per se well-known methodafter completion of the reaction.

In addition, each of the alkyl ether derivatives of the general formulas[1], [1a], [1b] and [1c] or its salt can be converted to another alkylether derivative of the general formula [1] or its salt by a propercombination of per se well-known methods such as oxidation, reduction,alkylation, halogenation, sulfonylation, substitution, dehydration,hydrolysis and the like.

The alkyl ether derivatives of the general formulas [1], [1a], [1b] and[1c] or their salts can be isolated and separated according to one ormore conventional operations which may be selected from extraction,crystallization, distillation, column chromatography and the like.

Processes for producing each of the compounds of the general formulas[2] and [5], which is a starting material for producing the compound ofthe present invention, are explained below.

The compound of the general formula [2] can be produced, for example, bythe following production process A by adopting one or a propercombination of per se well-known methods.

wherein R¹, R², A, X³, m and n are as defined above; R⁴ is a cyanogroup, a lower alkoxycarbonyl group, a dialkylaminocarbonyl group or acyclic aminocarbonyl group; and X⁴ is a leaving group.

-   (A-1) A compound of the general formula [11] can be produced by    reacting a compound of the general formula [6] with a compound of    the general formula [10] in the presence of a base.

This reaction may be carried out by a per se well-known method, forexample, the method described in Japanese Chemical Association, “ShinJikken Kagaku Koza” vol. 14, [I], pages 567–611 (1977), Maruzen Co.,Ltd. or a method based thereon.

-   (A-2) A compound of the general formula [11] can be produced by    reacting a compound of the general formula [8] with a compound of    the general formula [12] in the presence of a base.

This reaction may be carried out by a per se well-known method, forexample, the same method as in the production process (A-1).

-   (A-3) The compound of the general formula [2] can be produced by    subjecting the compound of the general formula [11] to a    conventional hydrolysis of nitrile, ester or amide.

This reaction may be carried out by a per se well-known method, forexample, the method described in Japanese Chemical Association, “ShinJikken Kagaku Koza” vol. 14, [II], pages 930–950 (1977), Maruzen Co.,Ltd. and Theodora W. Green, “Protective Groups in Organic Synthesis”pages 152–192 (1981), John Wiley & Sons. Inc. or a method based thereon.

-   (A-4) A compound of the general formula [11a] can be produced by    subjecting a compound of the general formula [6] to Michael addition    with a compound of the general formula [16] in the presence of a    base.

This reaction may be carried out by a per se well-known method, forexample, the method described in any of “Chemical & PharmaceuticalBulletin” vol. 41, pages 1659–1663 (1993), Japanese ChemicalAssociation, “Shin Jikken Kagaku Koza” vol. 14, [I], pages 585–587(1977), Maruzen Co., Ltd. and JP-A-3-99038, or a method based thereon.

-   (A-5) A compound of the general formula [2a] can be produced by    subjecting the compound of the general formula [11a] to a    conventional hydrolysis of nitrile, ester or amide.

This reaction may be carried out by a per se well-known method, forexample, the same method as in (A-3).

The compound of the general formula [5] can be produced, for example, bythe following production process B by adopting one or a propercombination of per se well-known methods.

wherein R¹, R², X¹, A, m and n are as defined above; R^(4a) is analkoxycarbonyl group; R⁵ is a hydroxyl-protecting group which is stableunder basic conditions; and each of X⁵ and X⁶ is a leaving group.

The hydroxyl-protecting group stable under basic conditions includes,for example, lower alkyl groups such as tert-butyl and the like; loweralkenyl groups such as allyl and the like; ar-lower alkyl groups such asbenzyl, 4-methoxybenzyl, 3,4-dimethoxybenzyl, diphenylmethyl, trityl andthe like; oxygen-containing or sulfur-containing heterocyclic groupssuch as tetrahydrofuryl, tetrahydropyranyl, tetrahydrothiopyranyl andthe like; lower alkoxy-lower alkyl groups such as methoxymethyl,2-(trimethylsilyl)ethoxymethyl, 1-methyl-1-methoxyethyl and the like;and substituted silyl groups such as tert-butyldimethylsilyl,diphenylmethylsilyl and the like.

-   (B-1) The compound of the general formula [5] can be produced by    reacting a compound of the general formula [6] with a compound of    the general formula [13].

This reaction may be carried out by a per se well-known method, forexample, the method described in Tetrahedron Letters, vol. 38, pages3251–3254 (1975) and Japanese Chemical Association, “Shin Jikken KagakuKoza” vol. 14, [I], pages 567–611 (1977), Maruzen Co., Ltd. or a methodbased thereon.

-   (B-2) A compound of the general formula [15] can be produced by    reacting a compound of the general formula [6] with a compound of    the general formula [14], and then removing the protecting group.

This reaction may be carried out by a per se well-known method, forexample, the same method as in production process 3, and then theprotecting group may be removed.

-   (B-3) A compound of the general formula [15] can be produced by    subjecting a compound of the general formula [2] or a compound of    the general formula [11b] to a conventional reduction.

This reduction may be carried out by a per se well-known method, forexample, the method described in “Shin Jikken Kagaku Koza” vol. 15,pages 26–244 (1977), Maruzen Co., Ltd. or a method based thereon.

-   (B-4) The compound of the general formula [5] can be produced by    reacting the compound of the general formula [15] with a    halogenating agent or a sulfonylating agent in the presence or    absence of a base.

A solvent used in this reaction includes, for example, halogenatedhydrocarbons such as methylene chloride, chloroform and the like; etherssuch as tetrahydrofuran, dioxane and the like; aromatic hydrocarbonssuch as benzene, toluene, xylene and the like; sulfoxides such asdimethyl sulfoxide and the like; amides such as N,N-dimethylformamideand the like; esters such as ethyl acetate and the like; and nitritessuch as acetonitrile and the like. These solvents may be used singly oras a mixture thereof.

The base optionally used includes, for example, organic or inorganicbases such as triethylamine, diisopropylethylamine,1,8-diazabicyclo[5,4,0]undec-7-ene, pyridine, potassium tert-butoxide,sodium carbonate, potassium carbonate, sodium hydride and the like.

The halogenating agent includes, for example, phosphorus oxychloride,phosphorus oxybromide, phosphorus trichloride, phosphorus pentachloride,carbon tetrabromide-triphenylphosphine, and thionyl chloride.

The sulfonylating agent includes, for example, methanesulfonyl chlorideand p-toluenesulfonyl chloride.

The amount of each of the halogenating agent or sulfonylating agent andthe base used is 1 mole or more, preferably 1 to 2 moles, per mole ofthe compound of the general formula [15].

The reaction is carried out at usually −50° C. to 200° C., preferably 0°C. to 50° C., for 10 minutes to 30 hours.

When any of the compounds of the general formulas [2], [2a], [6], [8],[10] to [16], [11a] and [11b] in production processes A and B has ahydroxyl group, an amino group or a carboxyl group, it is possible topreviously protect the hydroxyl group, the amino group or the carboxylgroup with a conventional protecting group and, if necessary, remove theprotecting group by a per se well-known method after completion of thereaction.

When any of the compounds of the general formulas [2], [2a], [6], [8],[10] to [16], [11a] and [11b] has isomers (for example, optical isomers,geometrical isomers and tautomers), each of these isomers can be used.In addition, any of the compounds may be used in the form of a hydrateor solvate or in any crystal form.

Each of the compounds of the general formulas [2], [2a], [6], [8], [10]to [16], [11a] and [11b] may be used as it is in the subsequent reactionwithout isolation.

The compound of the present invention can be formulated intopharmaceutical preparations such as oral preparations (e.g. tablets,capsules, powders, granules, fine granules, pills, suspensions,emulsions, solutions and syrups), injections, suppositories, externalpreparations (e.g. ointments and patches), aerosols and the like byblending therewith various pharmaceutical additives such as excipients,binders, disintegrators, disintegration inhibitors,consolidation•adhesion inhibitors, lubricants, absorption•adsorptioncarriers, solvents, fillers, isotonicity agents, solubilizers,emulsifying agents, suspending agents, thickening agents, coatingagents, absorption accelerators, gelation. coagulation accelerators,light stabilizers, preservatives, dehumidifiers,emulsion.suspension.dispersion stabilizers, color protectors,deoxygenation.oxidation inhibitors, sweetening.flavoring agents,coloring agents, foaming agents, defoaming agents, soothing agents,antistatic agents, buffering and pH-adjusting agents, etc.

The above various pharmaceuticals are prepared by conventional methods.

The oral solid pharmaceuticals such as tablets, powders and granules areprepared by a conventional method by using pharmaceutical additives forsolid preparation, for example, excipients such as lactose, sucrose,sodium chloride, glucose, starch, calcium carbonate, kaolin, crystallinecellulose, anhydrous calcium secondary phosphate, partly pregelatinizedstarch, corn starch, alginic acid and the like; binders such as simplesyrup, a glucose solution, a starch solution, a gelatin solution,polyvinyl alcohols, polyvinyl ethers, polyvinylpyrrolidones,carboxymethyl cellulose, shellac, methyl cellulose, ethyl cellulose,sodium alginate, gum arabic, hydroxypropylmethyl cellulose,hydroxypropyl cellulose, water, ethanol and the like; disintegratorssuch as dried starch, alginic acid, agar powder, starch, crosslinkedpolyvinylpyrrolidones, crosslinked carboxymethyl cellulose sodium salt,carboxymethyl cellulose calcium salt, starch sodium glycolate and thelike; disintegration inhibitors such as stearyl alcohol, stearic acid,cacao butter, hydrogenated oil and the like; consolidation.adhesioninhibitors such as aluminum silicate, calcium hydrogenphosphate,magnesium oxide, talc, silicic acid anhydride and the like; lubricantssuch as carnauba wax, light silicic acid anhydride, aluminum silicate,magnesium silicate, hydrogenated oil, hydrogenated vegetable oilderivatives, sesame oil, white beeswax, titanium oxide, dried aluminumhydroxide gel, stearic acid, calcium stearate, magnesium stearate, talc,calcium hydrogenphosphate, sodium lauryl sulfate, polyethylene glycolsand the like; absorption accelerators such as quaternary ammonium salts,sodium lauryl sulfate, urea, enzymes and the like; andabsorption-adsorption carriers such as starch, lactose, kaolin,bentonite, silicic acid anhydride, hydrated silicon dioxide, magnesiumaluminate metasilicate, colloidal silica and the like.

If necessary, tablets can be made into tablets having a conventionalcoating, such as sugar coated tablets, gelatin coated tablets, gastriccoated tablets, enteric coated tablets and water-soluble-film coatedtablets.

The capsules are prepared by mixing the compound of the presentinvention with the above-exemplified various pharmaceutical additivesand packing the resulting mixture into hard gelatin capsules, softcapsules or the like.

The compound of the present invention can be formulated into an aqueousor oily suspension, solution, syrup or elixir by a conventional methodby using the above-exemplified various additives for liquid preparation,such as solvents, fillers, isotonicity agents, solubilizers, emulsifyingagents, suspending agents, thickening agents and the like.

The suppositories are prepared by adding a suitable absorptionaccelerator to, for example, a polyethylene glycol, cacao butter,lanolin, a higher alcohol, a higher alcohol ester, gelatin, asemi-synthesized glyceride or Witepsol.

The injections are prepared by a conventional method by usingpharmaceutical additives for liquid preparation, for example, diluentssuch as water, ethanol, Macrogol, propylene glycol, citric acid, aceticacid, phosphoric acid, lactic acid, sodium lactate, sulfuric acid,sodium hydroxide and the like; pH adjustors and buffers, such as sodiumcitrate, sodium acetate, sodium phosphate and the like; stabilizers suchas sodium pyrosulfite, ethylenediaminetetraacetic acid, thioglycolicacid, thiolactic acid and the like; isotonicity agents such as sodiumchloride, glucose, mannitol, glycerol and the like; solubilizers such ascarboxymethyl cellulose sodium salt, propylene glycol, sodium benzoate,benzyl benzoate, urethane, ethanolamine, glycerol and the like; soothingagents such as calcium gluconate, chlorobutanol, glucose, benzyl alcoholand the like; and local anesthetics.

The ointments in the form of paste, cream or gel are prepared by mixingand formulation according to a conventional method by usingpharmaceutical additives, for example, base ingredients such as whitesoft paraffin, polyethylenes, paraffin, glycerol, cellulose derivatives,polyethylene glycols, silicone, bentonite and the like; preservativessuch as methyl p-oxybenzoate, ethyl p-oxybenzoate, propyl p-oxybenzoateand the like; stabilizers; and wetting agents.

When the patch is prepared, the above-mentioned ointment, cream, gel orpaste is applied on a conventional support by a conventional method. Asthe support, there can be used woven or nonwoven fabrics made of cotton,staple fiber or chemical fiber; and films or foamed sheets of soft vinylchloride, a polyethylene, a polyurethane or the like.

A method for administering the above-mentioned pharmaceuticalpreparation is not particularly limited and is properly determineddepending on the pharmaceutical form, the age, sex and other conditionsof a patient, and the symptom of the patient.

The dose of active ingredient of the pharmaceutical preparation of thepresent invention is properly chosen depending on administration route,the age, sex and pathosis of a patient, and other conditions. Usually,the active ingredient may be administered to an adult in a dose of 0.1to 500 mg per day in one portion or several portions.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention is illustrated with reference to the followingexamples, reference examples and test examples, which should not beconstrued as limiting the scope of the invention.

In the examples and reference examples, the mixing ratios in the eluentsare all by volume, and B. W. Silica gel, BW-127ZH or FL-100DX (mfd. byFUJI SILYSIA CHEMICAL LTD.) was used as a carrier in the columnchromatography.

The symbols used in the reaction schemes have the following meanings:

-   -   Ac: acetyl, Boc: tert-butoxycarbonyl,    -   Bz: benzoyl,    -   Piv: pivaloyl, Bn: benzyl, Tr: trityl,    -   MOM: methoxymethyl, BOM: benzyloxymethyl,    -   TES: triethylsilyl, THP: tetrahydropyranyl,    -   Ms: mesyl, Me: methyl, Et: ethyl, Ph: phenyl,    -   t-Bu: tert-butyl.

EXAMPLE 1 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-azetidinol

-   (1) In 12 mL of methylene chloride was dissolved 1.20 g of    2-[2-(1-benzothiophen-5-yl)ethoxy]acetic acid, and 2.3 mL of    triethylamine and 0.38 g of imidazole were added to the solution.    The resulting mixture was cooled to 5° C. and 0.41 mL of thionyl    chloride was added dropwise thereto, followed by stirring at the    same temperature for 1 hour. After the reaction mixture was cooled    to −60° C., 0.82 mL of triethylamine and 0.72 g of 3-azetidinol    hydrochloride were added thereto, and the resulting mixture was    stirred at the same temperature for 1 hour and then at room    temperature for 1.5 hours. Water was added to the reaction mixture    and the pH was adjusted to 1.0 with 6 mol/L hydrochloric acid, after    which the organic layer was separated. The organic layer was washed    with a saturated aqueous sodium chloride solution and then dried    over anhydrous magnesium sulfate. The solvent was distilled off    under reduced pressure to obtain    2-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-ethanone    as a yellow oil.-   (2) The aforesaid    2-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-ethanone    was dissolved in 12 mL of tetrahydrofuran and the resulting solution    was cooled to 5° C., after which 12.7 mL of a 1 mol/L solution of a    borane-tetrahydrofuran complex in tetrahydrofuran was added dropwise    thereto and the resulting mixture was stirred at room temperature    for 17 hours. To the reaction mixture was added 10 mL of acetone,    and stirred for 30 minutes, followed by adding thereto 6.0 mL of 6    mol/L hydrochloric acid, and the resulting mixture was heated under    reflux for 2 hours. After the reaction mixture was cooled, water and    ethyl acetate were added thereto and the pH was adjusted to 13 with    a 2 mol/L aqueous sodium hydroxide solution, and the organic layer    was separated. The organic layer was washed with a saturated aqueous    sodium chloride solution and then dried over anhydrous magnesium    sulfate. The solvent was distilled off under reduced pressure to    obtain 1.13 g of    1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-azetidinol as a yellow    oil.

IR(neat)cm⁻¹: 3378,2943,1438,1198,1119,703 NMR(CDCl₃)δ values:2.66(2H,t,J=6 Hz), 2.9–3.1(2H,m), 2.99(2H,t,J=7 Hz), 3.46(2H,t,J=6 Hz),3.6–3.7(2H,m), 3.67(2H,t,J=7 Hz), 4.41(1H,qn,J=6 Hz), 7.20(1H,dd,J=2,8Hz), 7.27(1H,d,J=5 Hz), 7.41(1H,d,J=5 Hz), 7.66(1H, d, J=2 Hz),7.78(1H,d,J=8 Hz)

EXAMPLE 2 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-azetidinol hydrochloride

In 4.2 mL of ethyl acetate was dissolved 1.03 g of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-azetidinol, and to thesolution was added 0.86 mL of a 4.76 mol/L dried hydrogen chloride-ethylacetate solution. The resulting mixture was stirred at room temperaturefor 1 hour and then at 5° C. for 1 hour. The crystals precipitated werecollected by filtration, washed with ethyl acetate and then dried toobtain 0.98 g of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-azetidinol hydrochloride.

Melting point: 101–102° C. IR(KBr)cm⁻¹: 3132,2952,1423,1340,1158,814,701NMR(CDCl₃)δ values: 2.97(2H,t,J=7 Hz), 3.2–3.3(2H,m), 3.69(2H,t,J=7 Hz),3.6–3.8(2H,m), 3.9–4.1(2H,m), 4.2–4.4(2H,m), 4.6–4.8(1H,m),7.18(1H,dd,J=1,8 Hz), 7.29(1H,d,J=5 Hz), 7.41(1H,d,J=5 Hz),7.65(1H,d,J=1 Hz), 7.78(1H,d,J=8 Hz)

EXAMPLE 3 Production of1-{3-[2-(1-benzothiophen-6-yl)ethoxy]propyl}-3-azetidinol

In 5 mL of dimethyl sulfoxide was dissolved 1.00 g of6-[2-(3-chloropropoxy)ethyl]-1-benzothiophene, and 0.86 g of3-azetidinol hydrochloride and 1.63 g of potassium carbonate were addedto the solution. The resulting mixture was stirred at 75° C. for 2.5hours and then at 95° C. for 1.5 hours. After the reaction mixture wascooled, water and ethyl acetate were added thereto and the pH wasadjusted to 1 with 6 mol/L hydrochloric acid, and the aqueous layer wasseparated. Ethyl acetate was added to the aqueous layer and the. pH wasadjusted to 10 with a 2 mol/L aqueous sodium hydroxide solution, afterwhich the organic layer was separated. The organic layer was washed withwater and then a saturated aqueous sodium chloride solution, dried overanhydrous magnesium sulfate, and then distilled under reduced pressureto remove the solvent. The residue was purified by a columnchromatography (eluent; chloroform:methanol=30:1 to 5:1) to obtain 0.28g of 1-{3-[2-(1-benzothiophen-6-yl)ethoxy]propyl}-3-azetidinol as acolorless oil.

IR(neat)cm⁻¹: 3398,2940,2867,1197,1107,820,757 NMR(CDCl₃)δ values:1.60(2H,qn,J=7 Hz), 2.45(2H,t,J=7 Hz), 2.7–2.8(2H,m), 2.99(2H,t,J=7 Hz),3.45(2H,t,J=7 Hz), 3.5–3.6(2H,m), 3.66(2H,t,J=7 Hz), 4.37(1H,qn,J=6 Hz),7.23(1H,dd,J=1,8 Hz), 7.29(1H,d,J=5 Hz), 7.37(1H,d,J=5 Hz),7.73(1H,d,J=1 Hz), 7.74(1H,d,J=8 Hz)

EXAMPLE 4 Production of1-{3-[2-(1-benzothiophen-6-yl)ethoxy]propyl}-3-azetidinol hydrochloride

In 3.0 mL of ethyl acetate was dissolved 0.28 g of1-{3-[2-(1-benzothiophen-6-yl)ethoxy]propyl}-3-azetidinol, and to thesolution was added 0.35 mL of a 3.25 mol/L dried hydrogen chloride-ethylacetate solution, after which the resulting mixture was stirred at roomtemperature for 1 hour. Then, the solvent was distilled off underreduced pressure to obtain 0.30 g of1-{3-[2-(1-benzothiophen-6-yl)ethoxy]propyl}-3-azetidinol hydrochlorideas a light-yellow oil.

IR(neat)cm⁻¹: 3264,2866,2596,1398,1109,1048,821 NMR(CDCl₃)δ values:1.81(2H,qn,J=6 Hz), 2.92(2H,t,J=6 Hz), 2.98(2H,t,J=6 Hz), 3.46(2H,t,J=6Hz), 3.68(2H,t,J=6 Hz), 3.8–3.9(2H,m), 3.8–4.0(2H,m), 4.4–4.6(1H,m),7.23(1H,dd,J=1,8 Hz), 7.31(1H,d,J=5 Hz), 7.39(1H,d,J=5 Hz),7.74(1H,d,J=1 Hz), 7.76(1H,d,J=8 Hz)

EXAMPLE 5 Production of1-{3-[2-(1-benzothiophen-2-yl)ethoxy]propyl}-3-azetidinol

In the same manner as in Example 3,1-{3-[2-(1-benzothiophen-2-yl)ethoxy]propyl}-3-azetidinol was obtainedas a colorless oil.

IR(neat)cm⁻¹: 3366,2942,2856,1458,1436,1113,750 NMR(CDCl₃)δ values:1.64(2H,qn=7 Hz), 2.49(2H,t,J=7 Hz), 2.7–2.8(2H,m), 3.15(2H,t,J=7 Hz),3.50(2H,t,J=7 Hz), 3.5–3.7(2H,m), 3.71(2H,t,J=7 Hz), 4.3–4.4(1H,m),7.06(1H,s), 7.2–7.4(2H,m), 7.67(1H,dd,J=1,7 Hz), 7.77(1H,dd,J=1,7 Hz)

EXAMPLE 6 Production of1-{3-[2-(1-benzothiophen-2-yl)ethoxy]propyl}-3-azetidinol hydrochloride

In the same manner as in Example 4,1-{3-[2-(1-benzothiophen-2-yl)ethoxy]propyl}-3-azetidinol hydrochloridewas obtained as a light-yellow oil.

IR(neat)cm⁻¹: 3290,2868,1457,1436,1113,751 NMR(CDCl₃)δ values: 1.83 (2H,qn, J=6 Hz), 2.91(2H,t,J=6 Hz), 3.16(2H,t,J=6 Hz), 3.52(2H,t,J=6 Hz),3.74(2H,t,J=6 Hz), 3.7–3.8(2H,m), 3.7–3.9(2H,m), 4.3–4.5(1H,m),7.09(1H,s), 7.27(1H,dt,J=1,8 Hz), 7.33(1H,dt,J=1,8 Hz), 7.69(1H,dd,J=1,8Hz), 7.78(1H,dd,J=1,8 Hz)

EXAMPLE 7 Production of1-{3-[2-(1-benzothiophen-7-yl)ethoxy]propyl}-3-azetidinol

In the same manner as in Example 3,1-{3-[2-(1-benzothiophen-7-yl)ethoxy]propyl}-3-azetidinol was obtainedas a colorless oil.

IR(neat)cm⁻¹: 3386,2942,2856,1458,1105,796,755,700 NMR(CDCl₃)δ values:1.61(2H,qn,J=7 Hz), 2.45(2H,t,J=7 Hz), 2.7–2.8(2H,m), 3.17(2H,t,J=7 Hz),3.48(2H,t,J=7 Hz), 3.5–3.7(2H,m), 3.79(2H,t,J=7 Hz), 4.3–4.5(1H,M),7.20(1H,dd,J=1,8 Hz), 7.32(1H,t,J=8 Hz), 7.36(1H,d,J=5 Hz),7.43(1H,d,J=5 Hz), 7.70(1H,dd,J=1,8 Hz)

EXAMPLE 8 Production of1-{3-[2-(1-benzothiophen-7-yl)ethoxy]propyl}-3-azetidinol hydrochloride

In the same manner as in Example 2,1-{3-[2-(1-benzothiophen-7-yl)ethoxy]propyl}-3-azetidinol hydrochloridewas obtained as colorless crystals.

Melting point: 105–106° C. IR(KBr)cm⁻¹:3252,2806,2620,1398,1130,1106,811,708 NMR(CDCl₃)δ values: 1.82(2H,qn,J=6Hz), 2.8–3.0(2H,m), 3.16(2H,t,J=6 Hz), 3.47(2H,t,J=6 Hz), 3.83(2H,t,J=6Hz), 3.7–4.1(4H,m), 4.5–4.7(1H,m), 7.21(1H,d,J=8 Hz), 7.36(1H,t,J=8 Hz),7.38(1H,d,J=5 Hz), 7.46(1H,d,J=5 Hz), 7.73 (1H,d,J=8 Hz)

EXAMPLE 9 (a) Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1

In 30 mL of dimethyl sulfoxide was dissolved 6.50 g of5-[2-(3-chloropropoxy)ethyl]-1-benzothiophene, and to the solution wereadded 5.60 g of 3-azetidinol hydrochloride and 15.3 mL of a 5.mol/Laqueous sodium hydroxide solution, after which the resulting mixture wasstirred at 65° C. for 3.5 hours. After the reaction mixture was cooled,water and ethyl acetate were added thereto and the pH was adjusted to 1with 6 mol/L hydrochloric acid, and the aqueous layer was separated.Ethyl acetate was added to the aqueous layer and the pH was adjusted to10 with a 5 mol/L aqueous sodium hydroxide solution, after which theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. The residue was purified by a column chromatography(eluent; chloroform:methanol=30:1 to 10:1) to obtain 4.77 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol.

(b) Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 2

-   (1) In 300 mL of tetrahydrofuran was dissolved 100 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]propionic acid, and 0.1 mL of    N,N-dimethylformamide was added thereto, after which 41.8 mL of    oxalyl chloride was added thereto over a period of 10 minutes and    the resulting mixture was stirred at room temperature for 1.5 hours.    The resulting solution was added dropwise to a solution of 65.7 g of    3-hydroxyazetidine hydrochloride and 59.5 g of sodium hydroxide in    600 mL of water at 10° C., followed by stirring at room temperature    for 1 hour. To the reaction solution were added 600 mL of water, 500    mL of ethyl acetate and sodium chloride, and the organic layer was    separated. To the aqueous layer was added 100 mL of ethyl acetate    and the organic layer was separated. The organic layers thus    obtained were combined. To the combined organic layer was added 100    mL of water and the pH was adjusted to 3.5 with 6 mol/L hydrochloric    acid, after which the organic layer was separated. The organic layer    was concentrated to a volume of about 200 mL, washed with a    saturated aqueous sodium hydrogen-carbonate solution and then a    saturated aqueous sodium chloride solution, dried over anhydrous    magnesium sulfate, and then distilled under reduced pressure to    remove the solvent. To the residue was added 300 mL of toluene, and    the resulting mixture was heated at 50° C. to effect dissolution,    after which seed crystals were added at 40° C. and the resulting    mixture was slowly cooled and then stirred under ice-cooling for 30    minutes. The crystals precipitated were collected by filtration to    obtain 96.6 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone    as light-brown crystals.-   (2) In 60 mL of tetrahydrofuran was dissolved 30.0 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    followed by adding dropwise thereto 275 mL of a 1 mol/L solution of    a borane-tetrahydrofuran complex in tetrahydrofuran, and the    resulting mixture was stirred at room temperature for 5 hours. To    the reaction solution was added dropwise 81.9 mL of 6 mol/L    hydrochloric acid, and the resulting mixture was refluxed for 1.5    hours. After cooling, the solvent was concentrated to be reduced by    about 290 mL, and the insoluble materials were filtered off. To the    filtrate were added 120 mL of water and 60 mL of toluene, and the    aqueous layer was separated and then washed with 60 mL of toluene.    To the aqueous layer was added 90 mL of ethyl acetate, and the pH    was adjusted to 9.5 with a 5 mol/L aqueous sodium hydroxide    solution, after which the organic layer was separated. The organic    layer was washed with a saturated aqueous sodium chloride solution    and dried over anhydrous magnesium sulfate. The solvent was    distilled off under reduced pressure and 5.35 g of fumaric acid and    54 mL of ethanol were added to the resulting residue. The resulting    mixture was heated at 74° C. to effect dissolution, and then 161 mL    of ethyl acetate was added dropwise thereto. The mixture thus    obtained was slowly cooled and then stirred at 5 to 10° C. for 30    minutes, and the crystals precipitated were collected by filtration    to obtain 22.7 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1/2    fumarate as light-brown crystals.-   (3) In 45 mL of water was suspended 22.7 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1/2    fumarate, and 68 mL of ethyl acetate was added thereto, after which    the pH was adjusted to 9.5 with a 1 mol/L aqueous sodium hydroxide    solution and then the organic layer was separated. The organic layer    was washed with a saturated aqueous sodium chloride solution, dried    over anhydrous magnesium sulfate, and then distilled under reduced    pressure to remove the solvent. The residue was purified by a column    chromatography (eluent; chloroform:methanol=20:1 to 10:1) and    crystallized from 40 mL of diisopropyl ether to obtain 16.0 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol as a    solid.

Melting point: 60–62° C. IR(KBr)cm⁻¹:3095,2944,2769,1361,1191,1098,810,709 NMR(CDCl₃)δ values: 1.61(2H,qn,J=7Hz), 2.45(2H,t,J=7 Hz), 2.7–2.9(2H,m), 2.99(2H,t,J=7 Hz), 3.45(2H,t,J=7Hz), 3.5–3.6(2H,m), 3.66(2H,t,J=7 Hz), 4.3–4.4(1H,m), 7.22(1H,dd,J=1,8Hz), 7.28(1H,d,J=5 Hz), 7.41(1H,d,J=5 Hz), 7.67(1H,d,J=1 Hz),7.79(1H,d,J=8 Hz)

EXAMPLE 10 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol hydrochloride

In the same manner as in Example 2,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol hydrochloridewas obtained as colorless crystals.

Melting point: 71–73° C. IR(KBr)cm⁻¹: 3301,2937,2809,2631,1125,1099,818,765,710 NMR(CDCl₃)δ values: 1.8–1.9(2H,m), 2.98(2H,t,J=7 Hz),2.9–3.1(2H,m), 3.48(2H,t,J=6 Hz), 3.69(2H,t,J=7 Hz), 3.6–4.4(4H,m),4.5–4.7(1H,m), 7.22(1H,dd,J=1,8 Hz), 7.31(1H,d,J=5 Hz), 7.44(1H,d,J=5Hz), 7.68(1H,d,J=1 Hz), 7.81 (1H,d,J=8 Hz)

EXAMPLE 11 Production of1-{3-[2-(1-benzothiophen-4-yl)ethoxy]propyl}-3-azetidinol

In the same manner as in Example 3,1-{3-[2-(1-benzothiophen-4-yl)ethoxy]propyl}-3-azetidinol was obtainedas a colorless oil.

IR(neat)cm⁻¹: 3368,2946,2856,1457,1107,759 NMR(CDCl₃)δ values:1.60(2H,qn,J=7 Hz), 2.44(2H,t,J=7 Hz), 2.7–2.9(2H,m), 3.22(2H,t,J=7 Hz),3.45(2H,t,J=7 Hz), 3.5–3.6(2H,m), 3.70(2H,t,J=7 Hz), 4.3–4.5(1H,m),7.19(1H,d,J=7 Hz), 7.28(1H,t,J=7 Hz), 7.44(1H,d,J=6 Hz), 7.46(1H,d,J=6Hz), 7.76 (1H, d, J=7 Hz)

EXAMPLE 12 Production of1-{3-[2-(1-benzothiophen-4-yl)ethoxy]propyl}-3-azetidinol hydrochloride

In the same manner as in Example 4,1-{3-[2-(1-benzothiophen-4-yl)ethoxy]propyl}-3-azetidinol hydrochloridewas obtained as a light-yellow oil.

IR(neat)cm⁻¹: 3302,2966,2877,2594,1412,1108,766 NMR(CDCl₃)δ values:1.78(2H,qn,J=6 Hz), 2.82(2H,t,J=7 Hz), 3.21(2H,t,J=6 Hz), 3.43(2H,t,J=6Hz), 3.73(2H,t,J=6 Hz), 3.7–3.9(2H,m), 3.8–4.0(2H,m), 4.5–4.7(1H,m),7.21(1H,d,J=7 Hz), 7.30(1H,t,J=7 Hz), 7.49(2H,s), 7.78(1H,d,J=7 Hz)

EXAMPLE 13 Production of1-{3-[2-(1-benzothiophen-3-yl)ethoxy]propyl}-3-azetidinol

In 5 mL of dimethyl sulfoxide was dissolved 1.00 g of3-[2-(3-chloropropoxy)ethyl]-1-benzothiophene, and 1.10 g of3-azetidinol trifluoroacetate and 1.63 g of potassium carbonate wereadded to the solution, after which the resulting mixture was stirred at70° C. for 2 hours. After the reaction mixture was cooled, water andethyl acetate were added thereto and the pH was adjusted to 1 with 6mol/L hydrochloric acid, and the aqueous layer was separated. Ethylacetate was added to the aqueous layer and the pH was adjusted to 10with a 2 mol/L aqueous sodium hydroxide solution, after which theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. The residue was purified by a column chromatography(eluent; chloroform:methanol=30:1 to 10:1) to obtain 0.55 g of1-{3-[2-(1-benzothiophen-3-yl)ethoxy]propyl}-3-azetidinol as a colorlessoil.

IR(neat)cm⁻¹: 3368,2942,2845,1427,1191,1109,759 NMR(CDCl₃)δ values:1.62(2H,qn,J=7 Hz), 2.47(2H,t,J=7 Hz), 2.7–2.9(2H,m), 3.11(2H,t,J=7 Hz),3.48(2H,t,J=6 Hz), 3.5–3.7(2H,m), 3.74(2H,t,J=7 Hz), 4.3–4.5(1H,m),7.18(1H,s), 7.33(1H,dt,J=1,7 Hz), 7.39(1H,dt,J=1,7 Hz), 7.77(1H,dd,J=1,7Hz), 7.86 (1H,dd, J=1,7 Hz)

EXAMPLE 14 Production of1-{3-[2-(1-benzothiophen-3-yl)ethoxy]propyl}-3-azetidinol hydrochloride

In the same manner as in Example 4,1-{3-[2-(1-benzothiophen-3-yl)ethoxy]propyl}-3-azetidinol hydrochloridewas obtained as a light-yellow oil.

IR(neat)cm⁻¹: 3284,2966,2596,1428,1112,1049,765,734 NMR(CDCl₃)δ values:1.83(2H,qn,J=6 Hz), 2.96(2H,t,J=6 Hz), 3.12(2H,t,J=6 Hz), 3.48(2H,t,J=6Hz), 3.76(2H,t,J=6 Hz), 3.8–3.9(2H,m), 3.9–4.1(2H,m), 4.5–4.7(1H,m),7.21(1H,s), 7.35(1H,dt,J=1,7 Hz), 7.40(1H,dt,J=1,7 Hz), 7.78(1H,dd,J=1,7Hz), 7.86(1H, dd,J=1,7 Hz)

EXAMPLE 15 Production ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl)acetamide

In 8 mL of N,N-dimethylformamide was dissolved 0.80 g of5-[2-(3-chloropropoxy)ethyl]-1-benzothiophene, and 1.20 g ofN-(3-azetidinyl)acetamide was added to the solution, after which theresulting mixture was stirred at 90° C. for 12 hours. After the reactionmixture was cooled, water and ethyl acetate were added thereto and theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. The residue was purified by a column chromatography(eluent; chloroform:methanol=7:1) to obtain 0.39 g ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl)acetamideas a light-yellow oil.

IR(neat)cm⁻¹: 3276,2941,2860,1654,1559,1111,756,703 NMR(CDCl₃)δ values:1.59(2H,qn,J=7 Hz), 1.97(3H,s), 2.42(2H,t,J=7 Hz), 2.7–2.9(2H,m),2.98(2H,t,J=7 Hz), 3.45(2H,t,J=7 Hz), 3.4–3.6(2H,m), 3.66(2H,t,J=7 Hz),4.4–4.5(1H,m), 7.22(1H,dd,J=1,8 Hz), 7.29(1H,d,J=5 Hz), 7.42(1H,d,J=5Hz), 7.67(1H,d,J=1 Hz), 7.80(1H,d,J=8 Hz)

EXAMPLE 16 Production of1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol

-   (1) In 7.4 mL of methylene chloride was dissolved 0.74 g of    2-[2-(1-benzothiophen-6-yl)ethoxy]acetic acid, and 1.36 mL of    triethylamine and 0.22 g of imidazole were added to the solution.    Then, the resulting mixture was cooled to 5° C., after which 0.24 mL    of thionyl chloride was added dropwise thereto, followed by stirring    at the same temperature for 1 hour. After the reaction mixture was    cooled to −50° C., 0.45 mL of triethylamine and 0.32 mL of    3-pyrrolidinol were added thereto, and the resulting mixture was    stirred at the same temperature for 1 hour and then at room    temperature for 1 hour. Water was added to the reaction mixture and    the organic layer was separated. The organic layer was washed    successively with 1 mol/L hydrochloric acid, a 2 mol/L aqueous    sodium hydroxide solution and a saturated aqueous sodium chloride    solution, and then dried over anhydrous magnesium sulfate.    Subsequently, the solvent was distilled off under reduced pressure    to obtain    2-[2-(1-benzothiophen-6-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanone    as a light-yellow oil.

IR(neat)cm⁻¹: 3386,2942,1636,1106,758

-   (2) The aforesaid    2-[2-(1-benzothiophen-6-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanone    was dissolved in 7.4 mL of tetrahydrofuran, and 7.4 mL of a 1 mol/L    solution of a borane-tetrahydrofuran complex in tetrahydrofuran was    added dropwise thereto under ice-cooling, followed by stirring at    room temperature for 17 hours. To the reaction mixture was added 10    mL of acetone, and stirred for 30 minutes, after which 1.5 mL of 6    mol/L hydrochloric acid was added thereto and the resulting mixture    was heated under reflux for 2 hours. After the reaction mixture was    cooled, water and ethyl acetate were added thereto and the aqueous    layer was separated. Ethyl acetate was added to the aqueous layer    and the pH was adjusted to 9.5 with a 2 mol/L aqueous sodium    hydroxide solution, after which the organic layer was separated. The    organic layer was washed with water and a saturated aqueous sodium    chloride solution, dried over anhydrous magnesium sulfate, and then    distilled under reduced pressure to remove the solvent. The residue    was purified by a column chromatography (eluent;    chloroform:methanol=30:1 to 20:1) to obtain 0.53 g of    1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol as a    yellow oil.

IR(neat)cm⁻¹: 3386,2940,2867,1110,820,756 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.0–2.2(1H,m), 2.31(1H,dt,J=7,9 Hz), 2.53(1H,dd,J=5,10Hz), 2.6–2.7(3H,m), 2.85(1H,dt,J=5,9 Hz), 3.01(2H,t,J=7 Hz),3.58(2H,t,J=6 Hz), 3.71(2H,t,J=7 Hz), 4.2–4.3(1H,m), 7.23(1H,d,J=8 Hz),7.29(1H,d,J=5 Hz), 7.37(1H,d,J=5 Hz), 7.73(1H,d,J=8 Hz), 7.73(1H,s)

EXAMPLE 17 Production of1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In 2.0 mL of ethyl acetate was dissolved 0.48 g of1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol, and to thesolution was added a solution of 0.15 g of oxalic acid in 2.8 mL ofethyl acetate. The resulting mixture was stirred at room temperature for1 hour and then at 5° C. for 1 hour. The crystals precipitated werecollected by filtration, washed with ethyl acetate and then dried toobtain 0.42 g of1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate ascolorless crystals.

IR(KBr)cm⁻¹: 3384,2862,2687,1717,1636,1400,1200, 1114,720 NMR(DMSO-d₆)δvalues: 1.7–1.8(1H,m), 1.9–2. (1H,m), 2.96(2H,t,J=7 Hz), 3.0–3.2(1H,m),3.1–3.4(5H,m), 3.6–3.8(4H,m), 4.3–4.4(1H,m), 7.29(1H,d,J=8 Hz),7.41(1H,d,J=5 Hz), 7.68(1H,d,J=5 Hz), 7.80(1H,d,J=8 Hz), 7.87(1H,s)

EXAMPLE 18 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained.

NMR(CDCl₃)δ values: 1.6–2.2(2H,m), 2.9–4.0(8H,m), 4.0–4.2(2H,m),4.2–4.5(1H,m), 7.1–7.4(2H,m), 7.42(1H,d,J=5 Hz), 7.69(1H,s),7.79(1H,d,J=8 Hz)

Then, 1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol wasobtained as a light-yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3386,2941,2864,1438,1112,755,702 NMR(CDCl₃)δ values:1.5–2.0(1H,m), 2.0–2.9(7H,m), 3.00(2H,t,J=7 Hz), 3.58(2H,t,J=6 Hz),3.71(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.21(1H,d,J=8 Hz), 7.28(1H,d,J=5 Hz),7.42(1H,d,J=5 Hz), 7.67(1H,s), 7.79 (1H, d, J=8 Hz)

EXAMPLE 19 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate wasobtained as colorless crystals.

IR(KBr)cm⁻¹: 3347,2943,2687,1719,1404,1119,720 NMR(CDCl₃)δ values:1.7–2.2(2H,m), 2.9–3.8(6H,m), 2.94(2H,t,J=6 Hz), 3.68(4H,t,J=6 Hz),4.2–4.5(1H,m), 7.17(1H,d,J=8 Hz), 7.26(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.62(1H,s), 7.78(1H,d,J=8 Hz)

EXAMPLE 20 Production of1-{2-[2-(1-benzothiophen-4-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-4-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained as an oil.

IR(neat)cm⁻¹: 3374,2944,1637,1107,761

Then, 1-{2-[2-(1-benzothiophen-4-yl)ethoxy]ethyl}-3-pyrrolidinol wasobtained as a light-yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3376,2939,2867,1452,1413,1111,760 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.1–2.2(1H,m), 2.30(1H,dt,J=6,9 Hz), 2.53(1H,dd,J=5,10Hz), 2.6–2.7(3H,m), 2.85(1H,dt,J=5,9 Hz), 3.25(2H,t,J=7 Hz),3.58(2H,t,J=6 Hz), 3.75(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.20(1H,d,J=7 Hz),7.27(1H,t,J=7 Hz), 7.44(1H,d,J=6 Hz), 7.46(1H,d,J=6 Hz), 7.75 (1H,d,J=7Hz)

EXAMPLE 21 Production of1-{2-[2-(1-benzothiophen-4-yl)ethoxy]ethyl}-3-pyrrolidinol hydrochloride

In 5.0 mL of ethyl acetate was dissolved 0.63 g of1-{2-[2-(1-benzothiophen-4-yl)ethoxy]ethyl}-3-pyrrolidinol, and to thesolution was added 0.80 mL of a 3.25 mol/L dried hydrogen chloride-ethylacetate solution. The resulting mixture was stirred at room temperaturefor 1 hour and then at 5° C. for 1 hour, after which the crystalsprecipitated were collected by filtration. The crystals precipitatedwere washed with ethyl acetate and then dried to obtain 0.43 g of1-{2-[2-(1-benzothiophen-4-yl)ethoxy]ethyl}-3-pyrrolidinol hydrochlorideas colorless crystals.

IR(KBr)cm⁻¹: 3229,2872,2625,1451,1413,1119,771 NMR(DMSO-d₆)δ values:1.7–2.2(2H,m), 2.9–3.6(6H,m), 3.22(2H,t,J=7 Hz), 3.74(4H,t,J=7 Hz),4.3–4.4(1H,m), 7.27(1H,d,J=8 Hz), 7.30(1H,t,J=8 Hz), 7.61(1H,d,J=5 Hz),7.77(1H,d,J=5 Hz), 7.86 (1H,d,J=8 Hz)

EXAMPLE 22 Production of1-{2-[2-(1-benzothiophen-7-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-7-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained as an oil.

NMR(CDCl₃)δ values: 1.8–2.0(2H,m), 3.1–3.3(3H,m), 3.3–3.6(3H,m)3.8–4.0(2H,m), 4.0–4.2(2H,m), 4.3–4.5(1H,m), 7.23(1H,d,J=7Hz),7.3–7.4(2H,m), 7.4–7.5(1H,m), 7.6–7.8(1H,m)

Then, 1-{2-[2-(1-benzothiophen-7-yl)ethoxy]ethyl}-3-pyrrolidinol wasobtained as a colorless oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3385,2941,2867,1459,1395,1106,795, 754,701 NMR(CDCl₃)δvalues: 1.6–1.8(1H,m), 2.1–2.2(1H,m), 2.30(1H,dt,J=7,9 Hz),2.52(1H,dd,J=5,10 Hz), 2.6–2.7(3H,m), 2.85(1H,dt,J=5,9 Hz),3.19(2H,t,J=7 Hz), 3.59(2H,t,J=6 Hz), 3.84(2H,t,J=7 Hz), 4.2–4.4(1H,m),7.20(1H,d,J=8 Hz), 7.32(1H,t,J=8 Hz), 7.35(1H,d,J=5 Hz,), 7.42(1H,d,J=5Hz), 7.69 (1H,d,J=8 Hz)

EXAMPLE 23 Production of1-{2-[2-(1-benzothiophen-7-yl)ethoxy]ethyl}-3-pyrrolidinol hydrochloride

In the same manner as in Example 21,1-{2-[2-(1-benzothiophen-7-yl)ethoxy]ethyl}-3-pyrrolidinol hydrochloridewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3283,2938,2706,1395,1358,1125,810,720 NMR(DMSO-d₆)δ values:1.7–2.2(2H,m), 2.8–3.7(6H,m), 3.12(2H,t,J=7 Hz), 3.7–3.8(2H,m),3.82(2H,t,J=7 Hz), 4.3–4.4(1H,m), 7.29(1H,d,J=7 Hz), 7.36(1H,t,J=7 Hz),7.49(1H,d,J=5 Hz), 7.76(1H,d,J=5 Hz), 7.77(1H,d,J=7 Hz)

EXAMPLE 24 Production of1-{2-[2-(1-benzothiophen-2-yl)ethoxy-]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-2-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained.

NMR(CDCl₃)δ values: 1.8–2.0(2H,m), 3.1–3.3(3H,m), 3.3–3.7(3H,m),3.8–4.0(2H,m), 4.1–4.2(2H,m), 4.2–4.5(1H,m), 7.10(1H,s), 7.2–7.4(2H,m),7.6–7.7(1H,m), 7.7–7.8(1H,m)

Then, 1-{2-[2-(1-benzothiophen-2-yl)ethoxy]ethyl}-3-pyrrolidinol wasobtained as a light-yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3396,2939,1458,1438,1113,747,727 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.1–2.2(1H,m), 2.34(1H,dt,J=6,9 Hz), 2.55(1H,dd,J=5,10Hz), 2.6–2.8(3H,m), 2.85(1H,dt,J=5,9 Hz), 3.18(2H,dt,J=1,7 Hz),3.62(2H,t,J=6 Hz), 3.77(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.07(1H,s),7.26(1H,dt,J=1,8 Hz), 7.31(1H,dt,J=1,8 Hz), 7.67(1H,dd,J=1,8 Hz),7.76(1H,dd,J=1,8 Hz)

EXAMPLE 25 Production of1-{2-[2-(1-benzothiophen-2-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,1-{2-[2-(1-benzothiophen-2-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate wasobtained as colorless crystals.

IR(KBr)cm⁻¹: 3432,2871,1716,1436,1127,827,760,706 NMR(DMSO-d6)δ values:1.7–1.8(1H,m), 1.9–2.2(1H,m), 3.0–3.4(8H,m), 3.73(4H,t,J=6 Hz),4.2–4.4(1H,m), 7.23(1H,s), 7.28(1H,t,J=7 Hz), 7.33(1H,t,J=7 Hz),7.74(1H,d,J=7 Hz), 7.87(1H,d,J=7 Hz)

EXAMPLE 26 Production of1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-3-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained as an oil.

NMR(CDCl₃)δ values: 1.8–1.9(1H,m), 1.9–2.0(1H,m), 3.1–3.6(6H,m),3.8–4.0(2H,m), 4.09(1H,s), 4.13(1H,s), 4.3–4.5(1H,m), 7.26(1H,s),7.3–7.4(2H,m), 7.77(1H,d,J=8 Hz), 7.85(1H,d,J=8 Hz)

Then, 1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinol wasobtained as a light-yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3388,2934,1426,1112,761,733 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.1–2.2 (1H,m), 2.33(1H,dt,J=6,9 Hz), 2.56(1H,dd,J=5,10Hz), 2.6–2.8(3H,m), 2.87(1H,dt,J=5,9 Hz), 3.14(2H,dt,J=1,7 Hz),3.61(2H,t,J=6 Hz), 3.80(2H,t,J=7 Hz), 4.3–4.4(1H,m), 7.20(1H,s),7.34(1H,dt,J=1,7 Hz), 7.38(1H,dt,J=1,7 Hz), 7.77(1H,dd,J=1,7 Hz),7.85(1H,dd,J=1,7 Hz)

EXAMPLE 27 Production of1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate wasobtained as colorless crystals.

IR(KBr)cm^(−1:) 3363,2922,2691,1718,1636,1427,1404, 1119,767,721NMR(DMSO-d₆)δ values: 1.7–1.8(1H,m), 2.0–2.2(1H,m), 3.10(2H,t,J=7 Hz),3.1–3.4(6H,m), 3.72(2H,t,J=5 Hz), 3.78(2H,t,J=7 Hz), 4.3–4.4(1H,m),7.37(1H,t,J=8 Hz), 7.42(1H,t,J=8 Hz), 7.51(1H,s), 7.85(1H,d,J=8 Hz),7.98(1H,d,J=8 Hz)

EXAMPLE 28 Production of1-{2-[2-(1-naphthyl)ethoxy]-ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-naphthyl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanone wasobtained as a yellow oil.

IR(neat)cm⁻¹: 3392,2946,1645,1133,800,779

Then, 1-{2-[2-(1-naphthyl)ethoxy]ethyl}-3-pyrrolidinol was obtained as alight-yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3395,2944,1107,778 NMR(CDCl₃)δ values: 1.5–1.9(1H,m),2.0–2.5(3H,m), 2.5–3.0(4H,m), 3.37(2H,t,J=7 Hz), 3.59(2H,t,J=6 Hz),3.80(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.4–7.6(4H,m), 7.6–8.0(2H,m),8.0–8.2(1H,m)

EXAMPLE 29 Production of1-{2-[2-(1-naphthyl)ethoxy]-ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,1-{2-[2-(1-naphthyl)ethoxy]ethyl}-3-pyrrolidinol oxalate was obtained ascolorless crystals.

IR(KBr)cm⁻¹: 3366,1400,1116,780,720 NMR(DMSO-d₆)δ values: 1.6–2.3(2H,m),2.7–3.5(8H,m), 3.5–3.9(4H,m), 4.2–4.5(1H,m), 7.4–7.6(4H,m),7.7–8.0(2H,m), 8.0–8.2(1H,m)

EXAMPLE 30 Production of(3S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-5-yl)ethoxy]-1-[(3S)-3-hydroxy-1-pyrrolidinyl]-1-ethanonewas obtained as a light-yellow oil.

Then, (3S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a light-yellow oil in the same manner as in Example 16(2).

IR(neat)cm⁻¹: 3386,2936,2867,1438,1111,755,702 NMR(CDCl₃)δ values:1.5–2.0(1H,m), 2.0–3.0(5H,m), 2.66(2H,t,J=6 Hz), 3.00(2H,t,J=7 Hz),3.58(2H,t,J=6 Hz), 3.71(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.21(1H,d,J=8 Hz),7.28(1H,d,t=5 Hz), 7.42(1H,d,J=5 Hz), 7.67(1H,s), 7.79(1H,d,J=8 Hz)

EXAMPLE 31 Production of(3S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,(3S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalatewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3366,2941,2867,2686,1718,1701,1404, 1114,720 NMR(DMSO-d₆)δvalues: 1.5–2.2(2H,m), 2.8–3.5(8H,m), 3.70(4H,t,J=6 Hz), 4.2–4.5(1H,m),7.28(1H,d,J=8 Hz), 7.40(1H,d,J=5 Hz), 7.73(1H,d,J=5 Hz), 7.76(1H,s),7.91 (1H, d, J=8 Hz)

EXAMPLE 32 Production of(3R)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-5-yl)ethoxy]-1-[(3R)-3-hydroxy-1-pyrrolidinyl]-1-ethanonewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3408,2937,1637,1137,1108,812,703

Then, (3R)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a light-yellow oil in the same manner as in Example 16(2).

IR(neat)cm⁻¹: 3373,2940,1438,1111,755,702 NMR(CDCl₃)δ values:1.5–2.0(1H,m), 2.0–3.0(5H,m), 2.68(2H,t,J=6 Hz), 3.01(2H,t,J=7 Hz),3.59(2H,t,J=6 Hz), 3.71(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.21(1H,d,J=8 Hz),7.28(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz), 7.67(1H,s), 7.79(1H,d,J=8 Hz)

EXAMPLE 33 Production of(3R)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,(3R)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalatewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3318,2870,1718,1114,720 NMR(DMSO-d6)δ values:1.5–2.2(2H,m), 2.8–3.5(8H,m), 3.70(4H,t,J=6 Hz), 4.2–4.5(1H,m),7.28(1H,d,J=8 Hz), 7.40(1H,d,J=5 Hz), 7.73(1H,d,J=5 Hz), 7.76(1H,s),7.91 (1H, d, J=8 Hz)

EXAMPLE 34 Production of(3S)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-6-yl)ethoxy]-1-[(3S)-3-hydroxy-1-pyrrolidinyl]-1-ethanonewas obtained as a colorless oil.

IR(neat)cm⁻¹: 3385,2944,1637,1133,820,699

Then, (3S)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a colorless oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3385,2940,2867,1110,820,757 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.1–2.2(1H,m), 2.32(1H,dt,J=6,9 Hz), 2.54(1H,dd,J=5,10Hz), 2.6–2.7(3H,m), 2.85(1H,dt,J=5,9 Hz), 3.01(2H,t,J=7 Hz),3.58(2H,t,J=6 Hz), 3.71(2H,t,J=7 Hz), 4.2–4.3(1H,m), 7.23(1H,d,J=8 Hz),7.29(1H,d,J=5 Hz), 7.37(1H,d,J=5 Hz), 7.73(1H,d,J=8 Hz), 7.74(1H,s)

EXAMPLE 35 Production of(3S)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,(3S)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol oxalatewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3364,2938,2692,1718,1400,1201,1114,720 NMR(DMSO-d₆)δvalues: 1.7–1.8(1H,m), 1.9–2.1(1H,m), 2.96(2H,t,J=7 Hz) 3.0–3.1(1H,m),3.1–3.3(5H,m), 3.70(4H,t,J=7 Hz),4.2–4.3(1H,m), 7.29(1H,d,J=8 Hz),7.41(1H,d,J=5 Hz), 7.68(1H,d,J=5 Hz), 7.80(1H,d,J=8 Hz), 7.87(1H,s)

EXAMPLE 36 Production of(3R)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-6-yl)ethoxy]-1-[(3R)-3-hydroxy-1-pyrrolidinyl]-1-ethanonewas obtained as an oil.

IR(neat)cm⁻¹: 3386,2940,1637,1107,820,758

Then, (3R)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a colorless oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3385,2940,2867,1110,820,757 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.1–2.2(1H,m), 2.32(1H,dt,J=6,9 Hz), 2.54(1H,dd,J=5,10Hz), 2.6–2.7(3H,m), 2.85(1H,dt,J=5,9 Hz), 3.01(2H,t,J=7 Hz),3.58(2H,t,J=6 Hz), 3.71(2H,t,J=7 Hz), 4.2–4.3(1H,m), 7.23(1H,d,J=8 Hz),7.29(1H,d,J=5 Hz), 7.37(1H,d,J=5 Hz), 7.73(1H,d,J=8 Hz), 7.74(1H,s)

EXAMPLE 37 Production of(3R)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,(3R)-1-{2-[2-(1-benzothiophen-6-yl)ethoxy]ethyl}-3-pyrrolidinol oxalatewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3364,2938,2688,1718,1400,1201,1114,720 NMR(DMSO-d₆)δvalues: 1.7–1.8(1H,m), 1.9–2.1(1H,m), 2.96(2H,t,J=7 Hz), 3.0–3.1(1H,m),3.1–3.3(5H,m), 3.70(4H,t,J=7 Hz),4.2–4.3(1H,m), 7.29(1H,d,J=8 Hz),7.41(1H,d,J=5 Hz), 7.68(1H,d,J=5 Hz), 7.80(1H,d,J=8 Hz), 7.87(1H,s)

EXAMPLE 38 Production of(3R)-1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-3-yl)ethoxy]-1-[(3R)-3-hydroxy-1-pyrrolidinyl]-1-ethanonewas obtained.

NMR(CDCl₃)δ values: 1.8–1.9(1H,m), 1.9–2.0(1H,m), 3.1–3.4(3H,m),3.3–3.7(3H,m), 3.8–4.0(2H,m), 4.0–4.2(2H,m), 4.3–4.5(1H,m),7.27(1/2H,s), 7.28(1H,s), 7.3–7.5(2H,m), 7.7–7.8(1H,m), 7.8–7.9(1H,m)

Then, (3R)-1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3386,2942,1458,1429,1113,759,733 NMR(CDCl₃)δ values:1.6–1.8(1H,m), 2.1–2.2(1H,m), 2.34(1H,dt,J=6,9 Hz), 2.55(1H,dd,J=5,10Hz), 2.6–2.8(3H,m), 2.85(1H,dt,J=5,9 Hz), 3.14(2H,t,J=7 Hz),3.61(2H,t,J=6 Hz), 3.80(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.21(1H,s),7.34(1H,dt,J=1,7 Hz), 7.38(1H,dt,J=1,7 Hz), 7.76(1H,dd,J=1,7 Hz), 7.85(1H, dd, J=1,7 Hz)

EXAMPLE 39 Production of(3R)-1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinolhydrochloride

In 5.0 mL of ethyl acetate was dissolved 0.99 g of(3R)-1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinol, and tothe solution was added 1.10 mL of a 3.25 mol/L dried hydrogenchloride-ethyl acetate solution, after which the resulting mixture wasstirred at room temperature for 1 hour. Then, the solvent was distilledoff under reduced pressure to obtain 1.05 g of(3R)-1-{2-[2-(1-benzothiophen-3-yl)ethoxy]ethyl}-3-pyrrolidinolhydrochloride as a light-yellow oil.

IR(neat)cm⁻¹: 3368,2946,1560,1430,1121,765,734 NMR(CDCl₃)δ values:1.9–2.1(1H,m), 2.1–2.3(1H,m), 2.8–3.0(2H,m), 3.1–3.2(4H,m),3.29(1H,d,J=12 Hz), 3.3–3.5(1H,m), 3.8–3.9(4H,m), 4.3–4.4(1H,m),7.24(1H,s), 7.35(1H,t,J=8 Hz), 7.40(1H,t,J=8 Hz), 7.76(1H,d,J=8 Hz),7.86(1H,d,J=8 Hz)

EXAMPLE 40 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-4-piperidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-5-yl)ethoxy]-1-(4-hydroxy-1-piperidinyl)-1-ethanonewas obtained as an oil.

Then, 1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-4-piperidinol wasobtained as a yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3386,2939,1110,1071,754,701 NMR(CDCl₃)δ values:1.5–2.3(6H,m), 2.5–3.0(2H,m), 2.56(2H,t,J=6 Hz), 3.00(2H,t,J=7 Hz),3.5–3.9(1H,m), 3.58(2H,t,J=6 Hz), 3.70(2H,t,J=7 Hz), 7.19(1H,d,J=8 Hz),7.27(1H,d,J=5 Hz), 7.41(1H,d,J=5 Hz), 7.65(1H,s), 7.78(1H,d,J=8 Hz)

EXAMPLE 41 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-4-piperidinol hydrochloride

In the same manner as in Example 21,1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-4-piperidinol hydrochloridewas obtained as light-brown crystals.

IR(KBr)cm⁻¹: 3312,2946,2691,1457,1124,1043,769,712 NMR(CDCl₃)δ values:1.5–2.5(4H,m), 2.8–3.2(6H,m), 2.99(2H,t,J=6 Hz), 3.76(2H,t,J=6 Hz),3.8–4.2(3H,m), 7.19(1H,d,J=8 Hz), 7.30(1H,d,J=5 Hz), 7.44(1H,d,J=5 Hz),7.67(1H,s), 7.80(1H,d,J=8 Hz)

EXAMPLE 42 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-piperidinol

In the same manner as in Example 16 (1),2-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-piperidinyl)-1-ethanonewas obtained as a yellow oil.

IR(neat)cm⁻¹: 3408,2938,1637,1114,704

Then, 1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-piperidinol wasobtained as a yellow oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3387,2937,1438,1109,703 NMR(CDCl₃)δ values: 1.4–2.0(4H,m),2.0–2.7(6H,m), 2.57(2H,t,J=6 Hz), 3.00(2H,t,J=7 Hz), 3.56(2H,t,J=6 Hz),3.6–3.9(1H,m), 3.70(2H,t,J=7 Hz), 7.20(1H,d,J=8 Hz), 7.28(1H,d,J=5 Hz),7.42(1H,d,J=5 Hz), 7.66(1H,s), 7.79(1H,d,J=8 Hz)

EXAMPLE 43 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-piperidinol hydrochloride

In the same manner as in Example 21,1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-piperidinol hydrochloridewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3260,2949,2638,1433,1129,1045,702,668 NMR(CDCl₃)δ values:1.5–2.0(4H,m), 2.1–2.8(2H,m), 2.99(2H,t,J=6 Hz), 3.1–3.6(4H,m),3.76(2H,t,J=6 Hz), 3.8–4.1(3H,m), 7.20(1H,d,J=8 Hz), 7.30(1H,d,J=5 Hz),7.44(1H,d,J=5 Hz), 7.67(1H,s),7.80(1H,d,J=8 Hz)

EXAMPLE 44 Production of1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-4-piperidinol

In the same manner as in Example 16 (1),2-[2-(1-benzofuran-5-yl)ethoxy]-1-(4-hydroxy-1-piperidinyl)-1-ethanonewas obtained.

IR(neat)cm⁻¹: 3406,2931,1636,1110,771,740

Then, 1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-4-piperidinol wasobtained as a colorless oil in the same manner as in Example 16 (2).

IR(neat)cm⁻¹: 3359,2939,1468,1111,1073,882,768,739 NMR(CDCl₃)δ values:1.5–2.3(6H,m), 2.5–3.0(2H,m), 2.57(2H,t,J=6 Hz), 2.97(2H,t,J=7 Hz),3.5–3.8(1H,m), 3.58(2H,t,J=6 Hz), 3.68(2H,t,J=7 Hz), 6.71(1H,dd,J=1,2Hz), 7.13(1H,dd,J=2,8 Hz), 7.40(1H,d,J=8 Hz), 7.42(1H,dd,J=1,2), 7.55(1H,d,J=2 Hz)

EXAMPLE 45 Production of1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-4-piperidinol hydrochloride

In the same manner as in Example 21,1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-4-piperidinol hydrochloride wasobtained as a light-yellow oil.

IR(neat)cm⁻¹: 3366,2938,2638,1458,1126,776,742 NMR(CDCl₃)δ values:1.6–2.4(4H,m), 2.8–3.2(8H,m), 3.71(2H,t,J=6 Hz), 3.7–4.1(3H,m),6.72(1H,dd,J=1,2 Hz), 7.12(1H,dd,J=2,8 Hz), 7.44(1H,d,J=8 Hz),7.42(1H,dd,J=1,2), 7.60 (1H,d, J=2 Hz)

EXAMPLE 46 Production of1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinol

-   (1) In 13.0 mL of tetrahydrofuran was dissolved 1.28 g of    2-[2-(1-benzofuran-5-yl)ethoxy]acetic acid and the solution was    cooled to 5° C., after which 1.41 g of 1,1′-carbonyldiimidazole was    added thereto and the resulting mixture was stirred at room    temperature for 2 hours. To the reaction mixture were added 1.22 mL    of triethylamine and 0.72 mL of 3-pyrrolidinol, followed by stirring    at room temperature for 2 hours. Water and ethyl acetate were added    to the reaction mixture and the pH was adjusted to 1 with 6 mol/L    hydrochloric acid, after which the organic layer was separated. The    organic layer was washed with a saturated aqueous sodium    hydrogencarbonate solution and then a saturated aqueous sodium    chloride solution, and dried over anhydrous magnesium sulfate. Then,    the solvent was distilled off under reduced pressure to obtain 1.39    g of    2-[2-(1-benzofuran-5-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanone    as a colorless oil.

IR(neat)cm⁻¹: 3398,2943,1637,1467,1128,1030,771,741

-   (2) In 14.0 mL of tetrahydrofuran was dissolved 1.39 g of    2-[2-(1-benzofuran-5-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanone,    and 14.4 mL of a 1 mol/L solution of a borane-tetrahydrofuran    complex in tetrahydrofuran was added dropwise thereto under    ice-cooling, after which the resulting mixture was stirred at room    temperature for 17 hours. To the reaction mixture was added 8.0 mL    of 6 mol/L hydrochloric acid, and the resulting mixture was heated    under reflux for 1 hour. After the reaction mixture was cooled,    water and ethyl acetate were added thereto and the pH was adjusted    to 10 with a 2 mol/L aqueous sodium hydroxide solution, and then the    organic layer was separated. The organic layer was washed with water    and then a saturated aqueous sodium chloride solution, dried over    anhydrous magnesium sulfate, and then distilled under reduced    pressure to remove the solvent. The residue was purified by a column    chromatography (eluent; chloroform:methanol=30:1 to 10:1) to obtain    0.96 g of 1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinol as    a colorless oil.

IR(neat)cm⁻¹: 3386,2941,1468,1261,1110,1030,882, 769,738 NMR(CDCl₃)δvalues: 1.5–2.0(1H,m), 1.9–3.0(5H,m), 2.68(2H,t,J=6 Hz), 2.98(2H,t,J=7Hz), 3.58(2H,t,J=6 Hz), 3.70(2H,t,J=7 Hz), 4.2–4.4(1H,m),6.71(1H,dd,J=1,2 Hz), 7.14(1H,d,J=8 Hz), 7.42(1H,d,J=8 Hz),7.4–7.5(1H,m), 7.59(1H,d,J=2 Hz)

EXAMPLE 47 Production of1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinol oxalate wasobtained as colorless crystals.

IR(KBr)cm⁻¹: 3418,2945,2698,1715,1197,1111,720 NMR(DMSO-d₆)δ values:1.6–2.3(2H,m), 2.92(2H,t,J=7 Hz), 3.0–3.5(6H,m), 3.5–3.8(4H,m),4.2–4.5(1H,m), 6.89(1H,dd,J=1,2 Hz), 7.19(1H,dd,J=1,8 Hz), 7.50(1H,d,J=8Hz), 7.5–7.6(1H,m), 7.94(1H,d,J=2 Hz)

EXAMPLE 48 Production of(3R*,4R*)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinediol

In the same manner as in Example 46 (1),2-[2-(1-benzothiophen-5-yl)ethoxy]-1-[(3R*,4R*)-3,4-dihydroxy-1-pyrrolidinyl]-1-ethanonewas obtained as a yellow oil.

IR(neat)cm⁻¹: 3370,2935,2874,1636,1131,756,701

Then,(3R*,4R*)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinediolwas obtained as a yellow oil in the same manner as in Example 46 (2).

IR(neat)c⁻¹: 3386,2938,2866,1438,1113,756,703 NMR(CDCl₃)δ values:2.5–3.0(5H,m), 3.00(2H,t,J=7 Hz), 3.2–3.7(1H,m), 3.56(2H,t,J=6 Hz),3.71(2H,t,J=7 Hz), 3.9–4.4(2H,m), 7.20(1H,d,J=8 Hz), 7.28(1H,d,J=5 Hz),7.43(1H,d,J=5 Hz), 7.66(1H,s), 7.80 (1H,d,J=8 Hz)

EXAMPLE 49 Production of(3R*,4R*)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinedioloxalate

In the same manner as in Example 17,(3R*,4R*)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinedioloxalate was obtained as colorless crystals.

IR(KBr)cm⁻¹: 3309,2929,1718,1617,1199,1104,702 NMR(DMSO-d₆)δ values:2.8–3.2(6H,m), 3.2–3.8(6H,m), 4.1–4.4(2H,m), 7.26(1H,d,J=8 Hz),7.39(1H,d,J=5 Hz), 7.72(1H,d,J=5 Hz), 7.75(1H,s), 7.90(1H,d,J=8 Hz)

EXAMPLE 50 Production of1-{2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 46 (1),2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained as a colorless oil.

IR(neat)cm⁻¹: 3394,2941,1637,1465,1197,1131,1015, 841,759

Then, 1-{2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a colorless oil in the same manner as in Example 46 (2).

IR(neat)cm⁻¹: 3386,2940,1466,1430,1198,1131,1015, 837,762 NMR(CDCl₃)δvalues: 1.5–2.4(3H,m), 2.5–3.0(5H,m), 2.99(2H,t,J=7 Hz), 3.59(2H,t,J=6Hz), 3.67(2H,t,J=7 Hz), 3.85(3H,s),4.2–4.4(1H,m), 6.68(1H,d,J=2 Hz),6.99(1H,s), 7.34(1H,s), 7.54 (1H,d,J=2 Hz)

EXAMPLE 51 Production of1-{2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]ethyl}-3-pyrrolidinoloxalate

In the same manner as in Example 17,1-{2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]ethyl}-3-pyrrolidinoloxalate was obtained as colorless crystals.

IR(KBr)cm⁻¹: 3396,2942,2691,1718,1636,1465,1198, 1130,720 NMR(DMSO-d₆)δvalues: 1.7–2.3(2H,m), 2.8–3.6(6H,m), 2.91(2H,t,J=6 Hz), 3.5–3.9(4H,m),3.83(3H,s), 4.2–4.5(1H,m), 6.86(1H,d,J=2 Hz), 7.17(1H,s), 7.43(1H,s),7.88(1H,d,J=2 Hz)

EXAMPLE 52 Production of1-{2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinol

In the same manner as in Example 46 (1),2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]-1-(3-hydroxy-1-pyrrolidinyl)-1-ethanonewas obtained as a colorless oil.

IR(neat)cm⁻¹: 3381,2944,1638,1475,1201,1125, 1011,758

Then, 1-{2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinolwas obtained as a colorless oil in the same manner as in Example 46 (2).

IR(neat)cm⁻¹: 3398,2938,1475,1202,1094,757,730 NMR(CDCl₃)δ values:1.5–2.4(3H,m), 2.5–3.0(5H,m), 2.98(2H,t,J=7 Hz), 3.59(2H,t,J=6 Hz),3.68(2H,t,J=7 Hz), 3.86(3H,s),4.2–4.4(1H,m), 6.65(1H,d,J=2 Hz),7.00(1H,s), 7.35(1H,s), 7.50 (1H,d, J=2 Hz)

EXAMPLE 53 Production of1-{2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinolhydrochloride

In the same manner as in Example 21,1-{2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinolhydrochloride was obtained as a colorless oil.

IR(neat)cm⁻¹: 3377,2938,2694,1475,1202,1124, 1093,1011 NMR(CDCl₃)δvalues: 1.7–2.2(2H,m), 2.8–3.6(6H,m), 2.96(2H,t,J=6 Hz), 3.5–4.2(4H,m),3.86(3H,s), 4.3–4.6(1H,m), 6.6–6.7(1H,m), 7.01(1H,s), 7.34(1H,d,J=1 Hz),7.51(1H,d,J=2 Hz)

EXAMPLE 54 Production of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinamine

-   (1) In 10.0 mL of tetrahydrofuran was dissolved 1.00 g of    2-[2-(1-benzothiophen-5-yl)ethoxy]acetic acid, and the solution was    cooled to 5° C., after which 1.03 g of 1,1′-carbonyldiimidazole was    added thereto and the resulting mixture was stirred at room    temperature for 1 hour. After the reaction mixture was cooled to 5°    C., 0.88 mL of triethylamine and 1.18 g of    tert-butyl=3-pyrrolidinylcarbamate were added thereto, followed by    stirring at room temperature for 1 hour. Water and ethyl acetate    were added to the reaction mixture and the pH was adjusted to 4 with    6 mol/L hydrochloric acid, after which the organic layer was    separated. The organic layer was washed with a saturated aqueous    sodium hydrogencarbonate solution and then a saturated aqueous    sodium chloride solution, and dried over anhydrous magnesium    sulfate. Then, the solvent was distilled off under reduced pressure    to obtain 2.00 g of    tert-butyl=1-{2-[2-(1-benzothiophen-5-yl)ethoxy]acetyl}-3-pyrrolidinylcarbamate    as a light-yellow oil.-   (2) In 2.0 mL of tetrahydrofuran was dissolved 2.00 g of the    aforesaid    tert-butyl=1-{2-[2-(1-benzothiophen-5-yl)ethoxy]acetyl}-3-pyrrolidinyl-carbamate,    and the resulting solution was cooled to 5° C., after which 10.6 mL    of a 1 mol/L solution of a borane-tetrahydrofuran complex in    tetrahydrofuran was added dropwise thereto and the resulting mixture    was stirred at room temperature for 17 hours. To the reaction    mixture was added 3.5 mL of 6 mol/L hydrochloric acid, and the    resulting mixture was heated under reflux for 3 hours. After the    reaction mixture was cooled, water and ethyl acetate were added    thereto and the pH was adjusted to 10 with a 5 mol/L aqueous sodium    hydroxide solution, and then the organic layer was separated. The    organic layer was washed with a saturated aqueous sodium chloride    solution, dried over anhydrous magnesium sulfate, and then distilled    under reduced pressure to remove the solvent. The residue was    purified by a column chromatography (eluent;    chloroform:methanol=30:1 to 15:1) to obtain 1.01 g of    1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinamine as a    light-yellow oil.

IR(neat)cm⁻¹: 3358,2938,2861,1438,1112,1052,755,703 NMR(CDCl₃)δ values:1.2–1.7(1H,m), 1.9–3.0(7H,m), 2.01(2H,s), 3.00(2H,t,J=7 Hz),3.3–3.7(1H,m), 3.57(2H,t,J=6 Hz), 3.71(2H,t,J=7 Hz), 7.20(1H,d, J=8 Hz),7.28(1H,d,J=5 Hz), 7.41(1H,d,J=5 Hz), 7.66(1H,s), 7.78(1H,d,J=8 Hz)

EXAMPLE 55 Production of1-{2-[2-(1-Benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinamine dioxalate

In 3.0 mL of ethyl acetate was dissolved 0.71 g of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinamine, and tothe solution was added a solution of 0.44 g of oxalic acid in 4.0 mL ofethyl acetate. The resulting mixture was stirred at room temperature for1 hour and then at 5° C. for 1 hour. The crystals precipitated werecollected by filtration, washed with ethyl acetate and then dried toobtain 1.03 g of1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3-pyrrolidinamine dioxalateas colorless crystals.

IR(KBr)cm⁻¹: 3447,2938,1406,1279,1115,720 NMR(DMSO-d₆)δ values:1.7–2.5(2H,m), 2.8–3.5(8H,m), 3.5–4.0(5H,m), 7.27(1H,d,J=8 Hz),7.40(1H,d,J=5 Hz), 7.72(1H,d,J=5 Hz), 7.75(1H,s), 7.90(1H,d,J=8 Hz)

EXAMPLE 56 Production of1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinamine

In the same manner as in Example 54 (1),tert-butyl=1-{2-[2-(1-benzofuran-5-yl)ethoxy]acetyl}-3-pyrrolidinylcarbamatewas obtained.

Then, 1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinamine wasobtained as a yellow oil in the same manner as in Example 54 (2).

IR(neat)cm⁻¹: 3356,2938,1467,1261,1111,1030,882, 769,740 NMR(CDCl₃)δvalues: 1.2–1.7(1H,m), 2.02(2H,s), 2.1–3.0(7H,m), 2.98(2H,t,J=7 Hz),3.3–3.7(1H,m), 3.57(2H,t,J=6 Hz), 3.69(2H,t,J=7 Hz), 6.71(1H,dd,J=1,2Hz), 7.15(1H,dd,J=1,7 Hz), 7.40(1H,d,J=7 Hz), 7.4–7.5(1H,m),7.59(1H,d,J=2 Hz)

EXAMPLE 57 Production of1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinamine oxalate

In the same manner as in Example 17,1-{2-[2-(1-benzofuran-5-yl)ethoxy]ethyl}-3-pyrrolidinamine oxalate wasobtained as colorless crystals.

IR(KBr)cm⁻¹: 3408,2952,1615,1311,1127,769 NMR(DMSO-d₆)δ values:1.5–1.9(1H,m), 1.8–2.4(1H,m), 2.1–3.0(6H,m), 2.89(2H,t,J=7 Hz),3.4–3.8(5H,m), 6.89(1H,dd,J=1,2 Hz), 7.18(1H,d,J=8 Hz), 7.50(1H,d,J=8Hz), 7.4–7.6(1H,m), 7.94(1H,d,J=2 Hz)

EXAMPLE 58 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinol

In 12 mL of N,N-dimethylformamide was dissolved 1.20 g of5-[2-(3-chloropropoxy)ethyl]-1-benzothiophene, and 0.82 g of3-pyrrolidinol and 1.30 g of potassium carbonate were added to thesolution, after which the resulting mixture was stirred at 85° C. for2.5 hours. After the reaction mixture was cooled, water and ethylacetate were added thereto and the organic layer was separated. Theorganic layer was washed with water and then a saturated aqueous sodiumchloride solution, dried over anhydrous magnesium sulfate, and thendistilled under reduced pressure to remove the solvent. The residue waspurified by a column chromatography (eluent; chloroform:methanol=20:1 to10:1) to obtain 0.78 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinol as acolorless oil.

IR(neat)cm⁻¹: 3386,2943,1438,1106,1052,755,701 NMR(CDCl₃)δ values:1.5–2.0(3H,m), 2.0–3.0(7H,m), 2.98(2H,t,J=7 Hz), 3.49(2H,t,J=6 Hz),3.67(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.1–7.3(2H,m), 7.41(1H,d,J=6 Hz),7.66(1H,s), 7.78(1H,d,J=8 Hz)

EXAMPLE 59 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinolhydrochloride

In the same manner as in Example 21,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinolhydrochloride was obtained as colorless crystals.

IR(KBr)cm⁻¹: 3368,2937,2695,1438,1108,821,764,708 NMR(CDCl₃)δ values:1.8–2.3(4H,m), 2.3–3.6(6H,m), 2.96(2H,t,J=6 Hz), 3.50(2H,t,J=6 Hz),3.68(2H,t,J=7 Hz), 4.3–4.7(1H,m), 7.21(1H,d,J=8 Hz), 7.30(1H,d,J=5 Hz),7.43(1H,d,J=5 Hz), 7.67(1H,s), 7.80 (1H,d,J=8 Hz)

EXAMPLE 60 Production of1-{3-[2-(1-benzofuran-5-yl)ethoxy]propyl}-3-pyrrolidinol

In the same manner as in Example 58,1-{3-[2-(1-benzofuran-5-yl)ethoxy]propyl}-3-pyrrolidinol was obtained asa light-yellow oil.

IR(neat)cm⁻¹: 3386,2942,1467,1261,1108,1030,883,740 NMR(CDCl₃)δ values:1.5–2.0(3H,m), 2.0–3.0(7H,m), 2.95(2H,t,J=7 Hz), 3.49(2H,t,J=6 Hz),3.65(2H,t,J=7 Hz),4.2–4.4(1H,m), 6.71(1H,dd,J=1,2 Hz), 7.14(1H,dd,J=1,8Hz), 7.3–7.5(2H,m), 7.58(1H,d, J=2 Hz)

EXAMPLE 61 Production of1-{3-[2-(1-benzofuran-5-yl)ethoxy]propyl}-3-pyrrolidinol hydrochloride

In the same manner as in Example 39,1-{3-[2-(1-benzofuran-5-yl)ethoxy]propyl}-3-pyrrolidinol hydrochloridewas obtained as a light-yellow oil.

IR(neat)cm⁻¹: 3339,2941,2605,1468,1262,1110,773,742 NMR(CDCl₃)δ values:1.6–2.4(4H,m), 2.4–4.0(12H,m), 4.4–4.8(1H,m), 6.72(1H,d,J=2 Hz),7.12(1H,d,J=8 Hz), 7.3–7.6(2H,m), 7.59(1H,d,J=2 Hz)

EXAMPLE 62 Production of1-{3-[2-(6-fluoro-1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinol

In the same manner as in Example 58,1-{3-[2-(6-fluoro-1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinol wasobtained as a yellow oil.

IR(neat)cm⁻¹: 3422,2952,1458,1257,1106,838,747,711 NMR(CDCl₃)δ values:1.5–3.0(10H,m), 3.00(2H,t,J=7 Hz), 3.4–3.6(2H,m), 3.68(2H,t,J=7 Hz),4.2–4.4(1H,m), 7.23(1H,d,J=5 Hz), 7.36(1H,d,J=5 Hz), 7.51(1H,d,J=10 Hz),7.66(1H,d,J=7 Hz)

EXAMPLE 63 Production of1-{3-[2-(6-fluoro-1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinolhydrochloride

In the same manner as in Example 39,1-{3-[2-(6-fluoro-1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinolhydrochloride was obtained as a yellow oil.

IR(neat)cm⁻¹: 3377,2954,2702,1458,1257,1107,750,712 NMR(CDCl₃)δ values:1.8–2.3(4H,m), 2.8–3.6(8H,m), 3.53(2H,t,J=6 Hz), 3.69(2H,t,J=7 Hz),4.3–4.4(1H,m), 7.27(1H,d,J=5 Hz), 7.39(1H,d,J=5 Hz), 7.52(1H,d,J=10 Hz),7.67(1H,d,J=7 Hz)

EXAMPLE 64 Production of(3R,4S)-1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3,4-pyrrolidinediol

In the same manner as in Example 58,(3R,4S)-1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3,4-pyrrolidinediolwas obtained as a colorless oil.

IR(neat)cm⁻¹: 3387,2940,1438,1159,1108,1051,703 NMR(CDCl₃)δ values:1.5–1.9(2H,m), 2.4–2.8(6H,m), 2.98(2H,t,J=7 Hz), 3.47(2H,t,J=6 Hz),3.67(2H,t,J=7 Hz), 4.1–4.3(2H,m), 7.20(1H,dd,J=1,8 Hz), 7.27(1H,d,J=5Hz), 7.42(1H,d,J=5 Hz), 7.65(1H,d,J=1 Hz), 7.79 (1H,d, J=8 Hz)

EXAMPLE 65 Production of(3R,4S)-1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3,4-pyrrolidinediolhydrochloride

In the same manner as in Example 21,(3R,4S)-1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3,4-pyrrolidinediolhydrochloride was obtained as colorless crystals.

IR(KBr)cm⁻¹: 3381.2871.2602,1120,808,768,718 NMR(DMSO-d₆)δ values:1.8–2.0(2H,m), 2.8–3.8(12H,m), 3.9–4.3(2H,m), 7.25(1H,dd,J=2,8 Hz),7.39(1H,d,J=5 Hz), 7.72(1H,d,J=5 Hz), 7.73(1H,d,J=2 Hz), 7.90(1H,d,J=8Hz)

EXAMPLE 66 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-4-piperidinol

In the same manner as in Example 58,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-4-piperidinol was obtainedas a light-yellow oil.

IR(neat)cm⁻¹: 3385,2935,1438,1364,1111,755,701 NMR(CDCl₃)δ values:1.4–2.2(8H,m), 2.1–2.5(2H,m), 2.5–3.0(2H,m), 2.98(2H,t,J=7 Hz),3.48(2H,t,J=6 Hz), 3.5–3.8(1H,m), 3.67(2H,t,J=7 Hz), 7.1–7.3(2H,m),7.42(1H,d,J=5 Hz), 7.66(1H,s), 7.79(1H,d,J=8 Hz)

EXAMPLE 67 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-4-piperidinol oxalate

In the same manner as in Example 17,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-4-piperidinol oxalate wasobtained as colorless crystals.

IR(KBr)cm⁻¹: 3420,2866,1718,1616,1190,1120,705 NMR(DMSO-d₆)δ values:1.5–2.0(6H,m), 2.8–3.1(8H,m), 3.4–3.8(1H,m), 3.44(2H,t,J=6 Hz),3.64(2H,t,J=6 Hz), 7.24(1H,d,J=8 Hz), 7.40(1H,d,J=5 Hz), 7.6–7.8(2H,m),7.91 (1H,d,J=8 Hz)

EXAMPLE 68 Production of1-{2-[2-(2-naphthyl)ethoxy]ethyl}-3-pyrrolidinol

In 8 mL of N,N-dimethylformamide was dissolved 0.80 g of2-[2-(2-naphthyl)ethoxy]-ethyl=methanesulfonate, and 0.45 mL of3-pyrrolidinol and 0.75 g of potassium carbonate were added to thesolution, after which the resulting mixture was stirred at 90° C. for 2hours. After the reaction mixture was cooled, water and ethyl acetatewere added thereto and the organic layer was separated. The organiclayer was washed with water and then a saturated aqueous sodium chloridesolution, dried over anhydrous magnesium sulfate, and then distilledunder reduced pressure to remove the solvent. The residue was purifiedby a column chromatography (eluent; chloroform:methanol=8:1 to 5:1) toobtain 0.51 g of 1-{2-[2-(2-naphthyl)ethoxy]ethyl}-3-pyrrolidinol as acolorless oil.

IR(neat)cm⁻¹: 3422,2938,1112,820,749 NMR(CDCl₃)δ values: 1.5–1.9(1H,m),2.0–2.5(3H,m), 2.5–3.0(4H,m), 3.05(2H,t,J=7 Hz), 3.59(2H,t,J=6 Hz),3.75(2H,t,J=7 Hz), 4.2–4.4(1H,m), 7.2–7.6(4H,m), 7.6–8.0(3H,m)

EXAMPLE 69 Production of1-{2-[2-(2-naphthyl)ethoxy]ethyl}-3-pyrrolidinol oxalate

In the same manner as in Example 17,1-{2-[2-(2-naphthyl)ethoxy]ethyl}-3-pyrrolidinol oxalate was obtained ascolorless crystals.

IR(KBr)cm⁻¹: 3366,2945,1405,1113,820,720 NMR(DMSO-d₆)δ values:1.6–2.3(2H,m), 2.7–3.5(8H,m), 3.5–3.9(4H,m), 4.2–4.5(1H,m),7.4–7.6(3H,m), 7.7–8.0(4H,m)

EXAMPLE 70 Production of(3R,4S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinediol

In 25 mL of N,N-dimethylformamide was dissolved 2.50 g of2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl=methanesulfonate, and 1.40 g of(3R,4S)-3,4-pyrrolidinediol hydrochloride and 4.70 mL of triethylaminewere added to the solution, after which the resulting mixture wasstirred at 90° C. for 1 hour. After the reaction mixture was cooled,water and ethyl acetate were added thereto and the pH was adjusted to 10with a 2 mol/L aqueous sodium hydroxide solution, and the organic layerwas separated. The organic layer was washed with water and then asaturated aqueous sodium chloride solution, and dried over anhydrousmagnesium sulfate. The solvent was distilled off under reduced pressureand the residue was purified by a column chromatography (eluent;chloroform:methanol=8:1 to 5:1) to obtain 0.84 g of(3R,4S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinediolas a yellow oil.

IR(neat)cm⁻¹: 3390,2940,1438,1111,1050,703 NMR(CDCl₃)δ values:2.5–3.0(6H,m), 3.00(2H,t,J=7 Hz), 3.55(2H,t,J=6 Hz), 3.70(2H,t,J=7 Hz),4.0–4.3(2H,m), 7.21(1H,dd,J=1,8 Hz), 7.28(1H,d,J=5 Hz), 7.43(1H,d,J=5Hz), 7.66(1H,d,J=1 Hz), 7.80 (1H,d,J=8 Hz)

EXAMPLE 71 Production of(3R,4S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinediolhydrochloride

In the same manner as in Example 21,(3R,4S)-1-{2-[2-(1-benzothiophen-5-yl)ethoxy]ethyl}-3,4-pyrrolidinediolhydrochloride was obtained as colorless crystals.

IR(KBr)cm⁻¹: 3194,2854,1365,1348,1130,1111,820,712 NMR(DMSO-d₆)δ values:2.8–4.0(12H,m), 3.9–4.3(2H,m), 7.2–7.5(2H,m), 7.7–8.2(3H,m)

EXAMPLE 72 Production oftert-butyl=1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl-carbamate

In 7 mL of N,N-dimethylformamide was dissolved 0.70 g of3-[2-(1-benzothiophen-5-yl)ethoxy]propyl=methanesulfonate, and 1.03 g oftert-butyl=3-pyrrolidinylcarbamate carbonate and 1.86 mL oftriethylamine were added to the solution, after which the resultingmixture was stirred at 90° C. for 2 hours. After the reaction mixturewas cooled, water and ethyl acetate were added thereto and the pH wasadjusted to 10 with 6 mol/L hydrochloric acid, and the organic layer wasseparated. The organic layer was washed with water and then a saturatedaqueous sodium chloride solution, and dried over anhydrous magnesiumsulfate. Subsequently, the solvent was distilled off under reducedpressure to obtain 1.12 g oftert-butyl=1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl-carbamateas a yellow oil.

NMR(CDCl₃)δ values: 1.2–1.9(3H,m), 1.44(9H,s), 1.9–3.0(7H,m),2.99(2H,t,J=7 Hz), 3.49(2H,t,J=6 Hz), 3.67(2H,t,J=7 Hz), 4.0–4.3(1H,m),7.19(1H,d,J=8 Hz), 7.27(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz), 7.66(1H,s),7.79 (1H,d, J=8 Hz)

EXAMPLE 73 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinamine

In 7.0 mL of ethyl acetate was dissolved 1.12 g oftert-butyl=1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinylcarbamate,and 1.86 mL of 6 mol/L hydrochloric acid was added to the solution,after which the resulting mixture was heated under reflux for 1 hour.After the reaction mixture was cooled, water and ethyl acetate wereadded thereto and the pH was adjusted to 10 with a 2 mol/L aqueoussodium hydroxide solution, and the organic layer was separated. Theorganic layer was washed with water and then a saturated aqueous sodiumchloride solution, dried over anhydrous magnesium sulfate, and thendistilled under reduced pressure to remove the solvent. The residue waspurified by a column chromatography (eluent; chloroform:methanol=30:1 to20:1) to obtain 0.38 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinamine as alight-yellow oil.

IR(neat)cm⁻¹: 3357,2937,2861.2796,1146,1108,755,701 NMR(CDCl₃)δ values:1.2–1.9(4H,m), 1.9–2.8(7H,m), 2.97(2H,t,J=7 Hz), 3.48(2H,t,J=6 Hz),3.66(2H,t,J=7 Hz), 7.19(1H,d,J=8 Hz), 7.23(1H,d,J=5 Hz), 7.39(1H,d,J=5Hz), 7.64(1H,s), 7.77 (1H,d, J=8 Hz)

EXAMPLE 74 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinamine oxalate

In the same manner as in Example 17,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinamine oxalatewas obtained as colorless crystals.

IR(KBr)cm⁻¹: 3390,2871,1614,1310,1122,766 NMR(DMSO-d₆)δ values:1.5–1.9(2H,m), 1.9–2.9(8H,m), 2.92(2H,t,J=7 Hz), 3.3–3.7(1H,m),3.43(2H,t,J=6 Hz), 3.62(2H,t,J=7 Hz), 7.25(1H,d,J=8 Hz), 7.39(1H,d,J=5Hz), 7.72(1H,d,J=5 Hz), 7.73(1H,s), 7.90 (1H,d, J=8 Hz)

EXAMPLE 75 Production ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)acetamide

In 5 mL of methylene chloride was dissolved 0.50 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinamine, and thesolution was cooled to −60° C., after which 0.27 mL of triethylamine and0.14 mL of acetyl chloride were added to the solution and the resultingmixture was stirred at room temperature for 1 hour. Water and ethylacetate were added to the reaction mixture and the organic layer wasseparated. The organic layer was washed with a saturated aqueous sodiumchloride solution, dried over anhydrous magnesium sulfate, and thendistilled under reduced pressure to remove the solvent. The residue waspurified by a column chromatography (eluent; chloroform:methanol=50:1 to10:1) to obtain 0.55 g ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)acetamideas a yellow oil.

IR(neat)cm⁻¹: 3292,2946,1654,1560,1110,757,702 NMR(CDCl₃)δ values:1.5–1.7(1H,m), 1.7–1.8(2H,m), 1.94(3H,s), 2.13(1H,q,J=9 Hz),2.2–2.3(1H,m), 2.4–2.5(3H,m), 2.59(1H,dd,J=2,10 Hz), 2.86(1H,dt,J=4,9Hz), 2.99(2H,t,J=7 Hz), 3.49(2H,t,J=6 Hz), 3.67(2H,t,J=7 Hz),4.3–4.5(1H,m), 5.8–5.9(1H,m), 7.22(1H,dd,J=1,8 Hz), 7.28(1H,d,J=5 Hz),7.42(1H,d,J=5 Hz), 7.67(1H,d,J=1 Hz), 7.79(1H,d,J=8 Hz)

EXAMPLE 76 Production ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)acetamidehydrochloride

In the same manner as in Example 21,N-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)acetamidehydrochloride was obtained as light-brown crystals.

IR(KBr)cm⁻¹: 3422,2868,2475,1664,1542,1343,1117,711 NMR(CDCl₃)δ values:1.9–2.1(3H,m), 2.05(3H,s), 2.3–2.4(1H,m), 2.4–2.5(1H,m), 2.6–2.7(1H,m),2.8–2.9(2H,m), 2.97(2H,t,J=6 Hz), 3.4–3.4(1H,m), 3.51(2H,t,J=6 Hz),3.6–3.7(1H,m), 3.70(2H,t,J=6 Hz), 4.6–4.8(1H,m), 7.22(1H,dd,J=1,8 Hz),7.31(1H,d,J=5 Hz), 7.46(1H,d,J=5 Hz), 7.67(1H,s), 7.81 (1H,d,J=8 Hz)

EXAMPLE 77 Production ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)methanesulfonamide

In the same manner as in Example 75,N-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)methanesulfonamidewas obtained as a yellow oil.

IR(neat)cm⁻¹: 3270,2927,2856,1320,1148,1110,756 NMR(CDCl₃)δ values:1.6–1.8(3H,m), 2.1–2.3(2H,m), 2.44(2H,t,J=7 Hz), 2.50(1H,dd,J=6,10 Hz),2.60(1H,dd,J=3,10 Hz), 2.77(1H,dt,J=4,9 Hz), 2.94(3H,s), 2.99(2H,t,J=7Hz), 3.48(2H,t,J=6 Hz), 3.68(2H,t,J=7 Hz), 3.9–4.0(1H,m), 4.6–4.8(1H,m),7.22(1H,dd,J=1,8 Hz), 7.28(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.67(1H,d,J=1 Hz), 7.79(1H,d,J=8 Hz)

EXAMPLE 78 Production ofN-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)methanesulfonamideoxalate

In the same manner as in Example 17,N-(1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinyl)methanesulfonamideoxalate was obtained as colorless crystals.

IR(KBr)cm⁻¹: 3250,2868,1718,1314,1165,1119,707 NMR(DMSO-d₆)δ values:1.8–2.0(3H,m), 2.2–2.3(1H,m), 2.93(2H,t,J=7 Hz), 2.97(3H,s),3.0–3.1(3H,m), 3.1–3.2(1H,m), 3.2–3.3(1H,m), 3.4–3.5(1H,m),3.45(2H,t,J=6 Hz), 3.63(2H,t,J=7 Hz), 4.0–4.1(1H,m), 7.26(1H,dd,J=1,8Hz), 7.40(1H,d,J=5 Hz), 7.4–7.6(1H,m), 7.72(1H,d,J=5 Hz), 7.74(1H,d,J=1Hz), 7.90 (1H,d, J=8 Hz)

EXAMPLE 79 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-N,N-dimethyl-3-pyrrolidinamine

In 8.6 mL of methanol was dissolved 0.43 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-pyrrolidinamine, and thesolution was cooled to 5° C., after which 0.35 mL of 37% formalin and0.09 g of sodium borohydride were added to the solution and theresulting mixture was stirred at room temperature for 17 hours. Underice-cooling, 2.6 mL of 2 mol/L hydrochloric acid was added to thereaction mixture, followed by stirring at room temperature for 30minutes, after which water and ethyl acetate were added thereto and theaqueous layer was separated. Ethyl acetate was added to the aqueouslayer and the pH was adjusted to 9.5 with a 2 mol/L aqueous sodiumhydroxide solution, after which the organic layer was separated. Theorganic layer was washed with a saturated aqueous sodium chloridesolution, dried over anhydrous magnesium sulfate, and then distilledunder reduced pressure to remove the solvent. The residue was purifiedby a column chromatography (eluent; chloroform:methanol=50:1 to 10:1) toobtain 0.39 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-N,N-dimethyl-3-pyrrolidinamineas a yellow oil.

IR(neat)cm⁻¹: 2945,2862,2786,1458,1111,700 NMR(CDCl₃)δ values:1.6–1.8(3H,m), 1.9–2.0(1H,m), 2.20(6H,s), 2.2–2.3(1H,m), 2.3–2.5(2H,m),2.50(1H,dt,J=8,12 Hz), 2.7–2.8(2H,m), 2.8–2.9(1H,m), 2.99(2H,t,J=7 Hz),3.49(2H,t,J=7 Hz), 3.67(2H,t,J=7 Hz), 7.22(1H,dd,J=1,8 Hz),7.28(1H,d,J=5 Hz), 7.41(1H,d,J=5 Hz), 7.67(1H,d,J=1 Hz), 7.79(1H,d,J=8Hz)

EXAMPLE 80 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-N,N-dimethyl-3-pyrrolidinaminedihydrochloride

In 4.0 mL of ethyl acetate was dissolved 0.39 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-N,N-dimethyl-3-pyrrolidinamine,and to the solution was added 0.80 mL of a 3.25 mol/L dried hydrogenchloride-ethyl acetate solution. The resulting mixture was stirred atroom temperature for 1 hour and then at 5° C. for 1 hour. The crystalsprecipitated were collected by filtration, washed with ethyl acetate andthen dried to obtain 0.32 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-N,N-dimethyl-3-pyrrolidinaminedihydrochloride as colorless crystals.

IR(KBr)cm⁻¹: 2936,1437,1101,701 NMR(CDCl₃)δ values: 1.9–2.1(2H,m),2.4–2.6(2H,m), 2.84(6H,s), 2.98(2H,t,J=7 Hz), 3.1–3.2(2H,m),3.4–3.9(4H,m), 3.54(2H,t,J=5 Hz), 3.72(2H,dt,J=3,7 Hz), 4.2–4.3(1H,m),7.24(1H,d,J=8 Hz), 7.35(1H,d,J=5 Hz), 7.43(1H,d,J=5 Hz), 7.71(1H,s),7.84(1H,d,J=8 Hz)

EXAMPLE 81 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1/2 fumarate

In 10.0 mL of ethanol was dissolved 5.00 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, and thesolution was heated at 70° C., after which 0.99 g of fumaric acid wasadded to the solution and stirred for 30 minutes. To the resultingsolution was added dropwise 30.0 mL of ethyl acetate, and the resultingmixture was stirred at 60° C. for 15 minutes, cooled to 5° C. over aperiod of 1 hour and then stirred at the same temperature for 1 hour.The crystals precipitated were collected by filtration, washed withethyl acetate and then dried to obtain 5.83 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1/2 fumarateas colorless crystals.

IR(KBr)cm⁻¹: 3258,2936,2862,1578,1360,1114,1109, 707,665 NMR(DMSO-d₆)δvalues: 1.5–1.6(2H,m), 2.60(2H,t,J=7 Hz), 2.91(2H,t,J=7 Hz),2.9–3.1(2H,m), 3.39(2H,t,J=7 Hz), 3.60(2H,t,J=7 Hz), 3.6–3.8(2H,m),4.1–4.3(1H,m), 6.50(1H,s), 7.25(1H,dd,J=1,8 Hz), 7.39(1H,d,J=5 Hz),7.72(1H,d,J=5 Hz), 7.73(1H,d,J=1 Hz), 7.89(1H,d,J=8 Hz)

EXAMPLE 82 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol

-   (1) In 12.5 mL of toluene was suspended 5.00 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]propionic acid, and 0.1 mL of    N,N-dimethylformamide was added thereto, after which 1.68 mL of    thionyl chloride was added dropwise thereto at 15° C. and the    resulting mixture was stirred at room temperature for 1 hour. The    reaction mixture was added dropwise to a solution of 4.44 g of    3-hydroxyazetidine 1/2 tartrate and 3.76 g of sodium hydroxide in 25    mL of water at 10° C., and stirred at room temperature for 1 hour.    Ethyl acetate was added to the reaction mixture and the organic    layer was separated. The organic layer was washed with diluted    hydrochloric acid and then a saturated aqueous sodium chloride    solution, dried over anhydrous magnesium sulfate, and then distilled    under reduced pressure to remove the solvent. The residue was    purified by a column chromatography (eluent; chloroform:acetone=3:1    to 1:1) and crystallized from diisopropyl ether to obtain 5.48 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone    as colorless crystals.

IR(KBr)cm⁻¹: 3316,2875,1610,1481,1112,992,706 NMR(CDCl₃)δ values:2.2–2.4(2H,m), 2.98(2H,t,J=7 Hz), 3.6–3.8(5H,m), 3.8–4.0(1H,m),4.1–4.3(2H,m), 4.4—4.4(1H,m), 7.20(1H,dd,J=1,8 Hz), 7.28(1H,dd,J=1,5Hz), 7.41(1H,d,J=5 Hz), 7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

-   (2) In 20 mL of tetrahydrofuran was dissolved 5.00 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    and 1.09 g of sodium borohydride was added thereto, after which 4.25    mL of a boron trifluoride-tetrahydrofuran complex was added dropwise    thereto at 10° C. and the resulting mixture was stirred at the same    temperature for 1 hour and then at 40° C. for 3 hours. After the    reaction mixture was cooled to 10° C., 30 mL of 6 mol/L hydrochloric    acid was added dropwise thereto and the resulting mixture was    refluxed for 1 hour. After cooling, the solvent was concentrated    under reduced pressure, and ethyl acetate was added. The pH was    adjusted to 9.4 with a 20% aqueous sodium hydroxide solution and    then the organic layer was separated. The organic layer was washed    with water and then a saturated aqueous sodium chloride solution,    dried over anhydrous magnesium sulfate, and then distilled under    reduced pressure to remove the solvent. The resulting residue was    purified by a column chromatography (eluent;    chloroform:methanol=20:1 to 10:1) and crystallized from    toluene-diisopropyl ether (1:3, 14 mL) to obtain 2.31 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol.

EXAMPLE 83 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate

In 56 mL of acetone was dissolved 8.00 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, followed byadding thereto 3.19 g of maleic acid, and the resulting mixture washeated at 60° C. to effect dissolution. The reaction mixture was slowlycooled and then stirred at 5° C. for 30 minutes. The crystalsprecipitated were collected by filtration to obtain 9.89 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate ascolorless crystals.

NMR(DMSO-d6)δ values: 1.6–1.8(2H,m), 2.93(2H,t,J=7 Hz), 3.13(2H,t,J=7Hz), 3.43(2H,t,J=6 Hz), 3.63(2H,t,J=7 Hz), 3.7–3.9(2H,m), 4.1–4.3(2H,m),4.4–4.5(1H,m), 6.04(2H,s), 7.26(1H,dd,J=1,8 Hz), 7.40(1H,d,J=5 Hz),7.7–7.8(1H,m), 7.74(1H,d,J=5 Hz), 7.92(1H,d,J=8 Hz)

EXAMPLE 84 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol nitrate

In 20 mL of ethyl acetate was dissolved 10.0 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, and 20 mL ofisopropanol was added thereto, after which 2.60 mL of concentratednitric acid (61%) was added dropwise thereto at room temperature. To thereaction mixture was added dropwise 60 mL of ethyl acetate, and theresulting mixture was stirred at the same temperature for 1 hour andthen at 5° C. for 1 hour. The crystals precipitated were collected byfiltration to obtain 11.3 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol nitrate ascolorless crystals.

IR(KBr)cm⁻¹: 3354,2880,1385,1107,712 NMR(DMSO-d₆) values: 1.6–1.8(2H,m),2.93(2H,t,J=7 Hz), 3.1–3.2(2H,m), 3.44(2H,t,J=6 Hz), 3.64(2H,t,J=7 Hz),3.7–3.9(2H,m), 4.0–4.4(2H,m), 4.4–4.5(1H,m), 7.27(1H,d,J=8 Hz),7.41(1H,d,J=5 Hz), 7.74(1H,d,J=5 Hz), 7.74(1H,s), 7.92(1H,d,J=8 Hz)

EXAMPLE 85 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol L-tartrate

In 40 mL of ethyl acetate was dissolved 10.0 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, and 5.15 g ofL-tartaric acid and 40 mL of ethanol were added thereto, after which theresulting mixture was heated at 65° C. to effect dissolution. After theresulting solution was stirred at 50° C. for 20 minutes, 40 mL of ethylacetate was added dropwise thereto at the same temperature and theresulting mixture was stirred at 20 to 30° C. for 1 hour. The crystalsprecipitated were collected by filtration to obtain 13.9 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol L-tartrate ascolorless crystals.

IR(KBr)cm⁻¹: 3318,2807,1305,1126,679,483 NMR(DMSO-d₆)δ values:1.5–1.7(2H,m), 2.82(2H,t,J=7 Hz), 2.92(2H,t,J=7 Hz), 3.2–3.4(2H,m),3.41(2H,t,J=6 Hz), 3.61(2H,t,J=7 Hz), 3.8–4.0(2H,m), 4.02(2H,s),4.2–4.4(1H,m), 7.26(1H,dd,J=2,8 Hz), 7.40(1H,d,J=5 Hz), 7.73(1H,d,J=5Hz), 7.7–7.8(1H,m), 7.91 (1H,d, J=8 Hz)

EXAMPLE 86 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1/2 succinate

In 30 mL of ethyl acetate was dissolved 10.0 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, and 2.03 g ofsuccinic acid and 35 mL of isopropanol were added thereto, after whichthe resulting mixture was refluxed to effect dissolution. After 40 mL ofethyl acetate was added dropwise to the reaction mixture, the resultingmixture was slowly cooled and then stirred at 5° C. for 30 minutes. Thecrystals precipitated were collected by filtration to obtain 11.1 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol 1/2 succinateas colorless crystals.

IR(KBr)cm⁻¹: 3250,2936,1576,1361,1109,707,652 NMR(DMSO-d₆)δ values:1.4–1.6(2H,m), 2.35(2H,s), 2.46(2H,t,J=7 Hz), 2.7–2.9(2H,m),2.91(2H,t,J=7 Hz), 3.38(2H,t,J=6 Hz), 3.5–3.6(2H,m), 3.59(2H,t,J=7 Hz),4.1–4.2(1H,m), 7.25(1H,dd,J=2,8 Hz), 7.39(1H,d,J=5 Hz), 7.72(1H,d,J=5Hz), 7.7–7.8(1H,m), 7.90(1H,d, J=8 Hz)

EXAMPLE 87 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol citrate

In 14.4 mL of ethanol was dissolved 10.0 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, followed byadding thereto 7.21 g of citric acid monohydrate, and the resultingmixture was heated at 50° C. to effect dissolution. To the resultingsolution were added 35 mL of ethyl acetate and 5.6 mL of ethanol at 50°C., and stirred at 25° C. The reaction mixture was heated at 40° C.,after which ethyl acetate (45 mL) was added dropwise thereto and theresulting mixture was stirred at 40° C. for 10 minutes and then at 10 to20° C. for 1 hour. The crystals precipitated were collected byfiltration to obtain 14.9 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol citrate ascolorless crystals.

IR(KBr)cm⁻¹: 3374,2943,1720,1224,1104,706 NMR(DMSO-d₆)δ values:1.6–1.7(2H,m), 2.50(2H,d,J=15 Hz), 2.58(2H,d,J=15 Hz), 93(2H,t,J=7 Hz),2.99(2H,t,J=7 Hz), 3.42(2H,t,J=6 Hz), 3.5–3.6(2H,m), 3.63(2H,t,J=7 Hz),4.0–4.1(2H,m), 4.3–4.4(1H,m), 7.26(1H,d,J=8 Hz), 7.40(1H,d,J=5 Hz),7.73(1H,d,J=5 Hz), 7.7–7.8(1H,m), 7.91 (1H, d, J=8 Hz)

EXAMPLE 88 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxyl]propyl}-3-azetidinyl=benzoate

-   (1) In 7 mL of methylene chloride was dissolved 0.70 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    and 0.57 mL of triethylamine was added to the solution. After the    resulting mixture was cooled to 5° C., 0.42 mL of benzoyl chloride    was added thereto, followed by stirring at the same temperature for    1 hour. Water was added to the reaction mixture and the pH was    adjusted to 1 with 2 mol/L hydrochloric acid, after which the    organic layer was separated. The organic layer was washed with a    saturated aqueous sodium chloride solution, dried over anhydrous    magnesium sulfate, and then distilled under reduced pressure to    remove the solvent. The residue was purified by a column    chromatography (eluent; toluene:ethyl acetate=5:1 to 2:1) to obtain    0.45 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propanoyl}-3-azetidinyl=benzoate    as a colorless oil.

IR(neat)cm⁻¹: 2873,1719,1654,1451,1274,1117,714 NMR(CDCl₃)δ values:2.3–2.4(2H,m), 2.99(2H,t,J=7 Hz), 3.72(2H,t,J=7 Hz), 3.7–3.8(2H,m),4.0–4.3(2H,m), 4.3–4.4(1H,m), 4.4–4.6(1H,m), 5.2–5.4(1H,m),7.1–7.3(2H,m), 7.41(1H,d,J=5 Hz), 7.46(2H,t,J=8 Hz), 7.5–7.7(2H,m),7.78(1H,d,J=8 Hz), 8.0–8.1 (2H,m)

-   (2) In 1 mL of tetrahydrofuran was dissolved 0.51 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propanoyl}-3-azetidinyl=benzoate,    and 6.8 mL of a 1 mol/L solution of a borane-tetrahydrofuran complex    in tetrahydrofuran was added dropwise thereto under ice-cooling,    after which the resulting mixture was stirred at room temperature    for 22 hours. To the reaction mixture was added 6.2 mL of ethanol,    and the resulting mixture was refluxed for 4 hours. After cooling,    the solvent was distilled off under reduced pressure and water and    ethyl acetate were added to the residue, and the organic layer was    separated. The organic layer was washed with a saturated aqueous    sodium chloride solution, dried over anhydrous magnesium sulfate,    and then distilled under reduced pressure to remove the solvent. The    residue was purified by a column chromatography (eluent;    toluene:ethyl acetate=5:1−chloroform) to obtain 0.33 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=benzoate    as a colorless oil.

IR(neat)cm⁻¹: 2941,1718,1274,1115,755,713 NMR(CDCl₃)δ values:1.6–1.7(2H,m), 2.54(2H,t,J=7 Hz), 3.00(2H,t,J=7 Hz), 3.0–3.2(2H,m),3.49(2H,t,J=6 Hz), 3.67(2H,t,J=7 Hz), 3.7–3.8(2H,m), 5.2–5.3(1H,m),7.22(1H,dd,J=2,8 Hz), 7.28(1H,d,J=5 Hz), 7.40(1H,d,J=5 Hz),7.45(2H,t,J=8 Hz), 7.5–7.6(1H,m), 7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz),8.0–8.1(2H,m)

EXAMPLE 89 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=benzoatemaleate

In 3 mL of ethyl acetate was dissolved 0.25 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=benzoate, and0.07 g of maleic acid was added thereto, after which the resultingmixture was heated to effect dissolution. The reaction mixture wascooled and the crystals precipitated were collected by filtration toobtain 0.15 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=benzoatemaleate.

IR(KBr)cm⁻¹: 2872,1732,1454,1358,1270,1119 NMR(DMSO-d₆)δ values:1.6–1.8(2H,m), 2.94(2H,t,J=7 Hz), 3.1–3.3(2H,m), 3.46(2H,t,J=6 Hz),3.65(2H,t,J=7 Hz), 4.1–4.3(2H,m), 4.4–4.6(2H,m), 5.3–5.5(1H,m),6.04(2H,s), 7.26(1H,d,J=8 Hz), 7.39(1H,d,J=5 Hz), 7.58(2H,t,J=8 Hz),7.7–7.8(3H,m), 7.91(1H,d,J=8 Hz), 8.0–8.1(2H,m)

EXAMPLE 90 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalate

-   (1) In 8 mL of methylene chloride was dissolved 1.00 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    and 0.40 mL of pyridine was added to the solution, after which 0.48    mL of pivaloyl chloride was added thereto under ice-cooling and the    resulting mixture was stirred at room temperature for 22 hours.    Water was added to the reaction mixture and the resulting mixture    was acidified with 6 mol/L hydrochloric acid, after which the    organic layer was separated. The organic layer was washed with a 2    mol/L aqueous sodium hydroxide solution and a saturated aqueous    sodium chloride solution, dried over anhydrous magnesium sulfate,    and then distilled under reduced pressure to remove the solvent. The    residue was purified by a column chromatography (eluent;    toluene:ethyl acetate=3:1 to 2:1) to obtain 1.20 g of    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]-propanoyl}-3-azetidinyl=pivalate    as a colorless oil.

IR(neat)cm⁻¹: 2972,1730,1655,1458,1282,1151, 1112,703 NMR(CDCl₃)δvalues: 1.21(9H,s), 2.2–2.4(2H,m), 2.99(2H,t,J=7 Hz), 3.6–3.8(4H,m),3.8–4.1(2H,m), 4.2–4.3(1H,m), 4.3–4.5(1H,m), 4.9–5.1(1H,m),7.1–7.3(2H,m), 7.42(1H,d,J=5 Hz), 7.6–7.7(1H,m), 7.80(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalate    was obtained.

IR(neat)cm⁻¹: 2938,1727,1283,1156,1110,756,702 NMR(CDCl₃)δ values:1.20(9H,s), 1.5–1.7(2H,m), 2.50(2H,t,J=7 Hz), 2.8–3.0(2H,m),2.99(2H,t,J=7 Hz), 3.47(2H,t,J=6 Hz), 3.6–3.8(4H,m), 4.9–5.1(1H,m),7.22(1H,dd,J=2,8 Hz), 7.2–7.3(1H,m), 7.42(1H,d,J=6 Hz), 7.6–7.7(1H,m),7.79(1H,d,J=8 Hz)

EXAMPLE 91 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalatemaleate

In the same manner as in Example 89,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalatemaleate was obtained.

IR(KBr)cm⁻¹: 2866,1740,1578,1452,1356,1165,1120,870 NMR(DMSO-d₆)δvalues: 1.18(9H,s), 1.6–1.8(2H,m), 2.8–3.0(2H,m), 3.0–3.3(2H,m),3.3–3.6(2H,m), 3.5–3.7(2H,m), 3.9–4.1(2H,m), 4.3–4.5(2H,m),5.0–5.2(1H,m), 6.05(2H,s), 7.26(1H,d,J=8 Hz), 7.40(1H,d,J=5 Hz),7.7–7.8(2H,m), 7.91(1H,d,J=8 Hz)

EXAMPLE 92 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=methyl=carbonate

-   (1) In the same manner as in Example 90 (1),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propanoyl}-3-azetidinyl=methyl=carbonate    was obtained.

IR(neat)cm⁻¹: 2943,1751,1272,1110,791,705 NMR(CDCl₃)δ values:2.2–2.4(2H,m), 2.99(2H,t,J=7 Hz), 3.7–3.8(2H,m), 3.71(2H,t,J=7 Hz),3.82(3H,s), 3.9–4.0(1H,m), 4.0–4.3(2H,m), 4.3–4.4(1H,m), 4.9–5.1(1H,m),7.21(1H,dd,J=1,8 Hz), 7.29(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.80 (1H, d, J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=methyl=carbonate    was obtained.

IR(neat)cm⁻¹: 2952,2858,1749,1442,1271,1109,792,704 NMR(CDCl₃)δ values:1.5–1.7(2H,m), 2.49(2H,t,J=7 Hz), 2.9–3.1(4H,m), 3.46(2H,t,J=6 Hz),3.6–3.7(4H,m), 3.78(3H,s), 4.9–5.1(1H,m), 7.21(1H,dd,J=2,8 Hz),7.28(1H,dd,J=1,5 Hz), 7.42(1H,d,J=5 Hz), 7.6–7.7(1H,m), 7.79(1H,d,J=8Hz)

EXAMPLE 93 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=methyl=carbonateoxalate

In 7 mL of ethyl acetate was dissolved 0.31 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=methyl=carbonate,and to the solution was added a solution of 0.10 g of oxalic acid in 1mL of ethyl acetate, after which the resulting mixture was stirred atroom temperature. The crystals precipitated were collected by filtrationto obtain 0.34 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=methyl=carbonateoxalate.

IR(KBr)cm⁻¹: 2863,2594,1753,1444,1278,1112,719 NMR(DMSO-d₆) values:1.6–1.8(2H,m), 2.92(2H,t,J=7 Hz), 3.0–3.1(2H,m), 3.42(2H,t,J=6 Hz),3.62(2H,t,J=7 Hz), 3.74(3H,s), 3.9–4.0(2H,m), 4.2–4.3(2H,m),5.0–5.2(1H,m), 7.26(1H,dd,J=1,8 Hz), 7.40(1H,dd,J=1,5 Hz),7.7–7.8(2H,m), 7.90 (1H,d, J=8 Hz)

EXAMPLE 94 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=ethyl=carbonate

-   (1) In the same manner as in Example 90 (1),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propanoyl}-3-azetidinyl=ethyl=carbonate    was obtained.

IR(neat)cm⁻¹: 2942,2873,1747,1654,1450,1260,1111, 791,704 NMR(CDCl₃)δvalues: 1.32(3H,t,J=7 Hz), 2.2–2.4(2H,m), 2.99(2H,t,J=7 Hz),3.7–3.8(2H,m), 3.71(2H,t,J=7 Hz), 3.9–4.0(1H,m), 4.0–4.2(1H,m),4.2–4.3(1H,m), 4.22(2H,q,J=7 Hz), 4.3–4.4(1H,m), 4.9–5.1(1H,m),7.21(1H,dd,J=2,8 Hz), 7.29(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.80(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=ethyl=carbonate    was obtained.

IR(neat)cm⁻¹: 2941,1750,1262,1110,1049,792,704 NMR(CDCl₃) values:1.31(3H,t,J=7 Hz), 1.5–1.7(2H,m), 2.50(2H,t,J=7 Hz), 2.9–3.1(4H,m),3.46(2H,t,J=6 Hz), 3.6–3.7(4H,m), 4.19(2H,q,J=7 Hz), 4.9–5.1(1H,m),7.21(1H,dd,J=2,8 Hz), 7.28(1H,dd,J=1,5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

EXAMPLE 95 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=ethyl=carbonateoxalate

In the same manner as in Example 93,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=ethyl=carbonateoxalate was obtained.

IR(KBr)cm⁻¹: 2932,2864,2583,1748,789,719 NMR(DMSO-d₆)δ values:1.23(3H,t,J=7 Hz), 1.6–1.8(2H,m), 2.92(2H,t,J=7 Hz), 3.0–3.1(2H,m),3.43(2H,t,J=6 Hz), 3.62(2H,t,J=7 Hz), 3.9–4.0(2H,m), 4.16(2H,q,J=7 Hz),4.2–4.3(2H,m), 5.0–5.2(1H,m), 7.26(1H,dd,J=2,8 Hz), 7.40(1H,d,J=6 Hz),7.7–7.8(2H,m), 7.90(1H,d,J=8 Hz)

EXAMPLE 96 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(methoxymethoxy)azetidine

-   (1) In 8.5 mL of methylene chloride was dissolved 1.52 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    and 2.6 mL of N,N-diisopropylethyl-amine was added to the solution.    After the resulting mixture was cooled to 5° C., 1.0 mL of    chloromethyl methyl ether was added thereto, followed by stirring at    room temperature for 17 hours. Water and ethyl acetate were added to    the reaction mixture and the organic layer was separated. The    organic layer was washed with a saturated aqueous sodium chloride    solution, dried over anhydrous magnesium sulfate, and then distilled    under reduced pressure to remove the solvent. The residue was    purified by a column chromatography (eluent; toluene:ethyl    acetate=3:1 to 1:1) to obtain 1.40 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-[3-(methoxymethoxy)-1-azetidinyl]-1-propanone    as an oil.

IR(neat)cm⁻¹: 2941,2867,1654,1112,1055,919,704 NMR(CDCl₃)δ values:2.3–2.4(2H,m), 2.99(2H,t,J=7 Hz), 3.37(3H,s), 3.7–3.8(2H,m),3.72(2H,t,J=7 Hz), 3.8–4.1(2H,m), 4.1–4.4(3H,m), 4.60(2H,s),7.21(1H,dd,J=2,8 Hz), 7.29(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(methoxymethoxy)azetidine    was obtained.

IR(neat)cm⁻¹: 2943,1113,1059,1012,919,703 NMR(CDCl₃)δ values:1.5–1.7(2H,m), 2.49(2H,t,J=7 Hz), 2.8–2.9(2H,m), 2.99(2H,t,J=7 Hz),3.36(3H,s), 3.47(2H,t,J=6 Hz), 3.5–3.7(4H,m), 4.2–4.3(1H,m), 4.59(2H,s),7.22(1H,dd,J=1,8 Hz), 7.28(1H,dd,J=1,5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

EXAMPLE 97 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(methoxymethoxy)azetidineoxalate

In the same manner as in Example 93,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(methoxymethoxy)azetidineoxalate was obtained.

IR(KBr)cm⁻¹: 2866,1719,1624,1112,989,920,707 NMR(DMSO-d₆) δ values:1.6–1.8(2H,m), 2.93(2H,t,J=7 Hz), 3.0–3.1(2H,m), 3.29(3H,s),3.43(2H,t,J=6 Hz), 3.63(2H,t,J=7 Hz), 3.7–3.9(2H,m), 4.1–4.3(2H,m),4.3–4.5(1H,m), 4.60(2H,s), 7.26(1H,dd,J=2,8 Hz), 7.40(1H,d,J=5 Hz),7.7–7.8(2H,m), 7.90(1H,d,J=8 Hz)

EXAMPLE 98 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-[(benzyloxy)methoxy]azetidine

-   (1) In the same manner as in Example 96 (1),    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-{3-[(benzyloxy)methoxy]-1-azetidinyl}-1-propanone    was obtained.

IR(neat)cm⁻¹: 2872,1654,1112,700 NMR(CDCl₃)δ values: 2.3–2.4(2H,m),2.99(2H,t,J=7 Hz), 3.7–3.8(2H,m), 3.71(2H,t,J=7 Hz), 3.8–4.3(4H,m),4.3–4.4(1H,m), 4.60(2H,s), 4.73(2H,s), 7.21(1H,dd,J=1,8 Hz),7.2–7.4(6H,m), 7.40(1H,d,J=5 Hz), 7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-[(benzyloxy)methoxy]azetidine    was obtained.

IR(neat)cm⁻¹: 2942,1196,1115,1060,700 NMR(CDCl₃)δ values: 1.5–1.7(2H,m),2.49(2H,t,J=7 Hz), 2.8–3.0(2H,m), 2.99(2H,t,J=7 Hz), 3.47(2H,t,J=6 Hz),3.5–3.7(2H,m), 3.66(2H,t,J=7 Hz), 4.2–4.4(1H,m), 4.60(2H,s), 4.72(2H,s),7.2–7.4(6H,m), 7.22(1H,dd,J=1,8 Hz), 7.41(1H,d,J=6 Hz), 7.6–7.7(1H,m),7.79(1H,d,J=8 Hz)

EXAMPLE 99 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine

-   (1) In 6.8 mL of toluene was dissolved 0.85 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    and to the solution were added 0.34 mL of pyridine, 0.02 g of    4-(dimethylamino)-pyridine and 0.93 g of trityl chloride, after    which the resulting mixture was stirred at 50° C. for 3 hours. To    the mixture was added 0.85 mL of N,N-dimethylformamide, followed by    stirring at 50° C. for another 24 hours. Water and ethyl acetate    were added to the reaction mixture and the organic layer was    separated. The organic layer was washed with a saturated aqueous    sodium chloride solution, dried over anhydrous magnesium sulfate,    and then distilled under reduced pressure to remove the solvent. The    residue was purified by a column chromatography (eluent;    toluene:ethyl acetate=5:1 to 3:1) to obtain 1.15 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-[3-(trityloxy)-1-azetidinyl]-1-propanone    as an oil.

IR(neat)cm⁻¹: 2940,2870,1654,1116,762,707 NMR(CDCl₃)δ values:2.18(2H,t,J=6 Hz), 2.94(2H,t,J=7 Hz), 3.5–3.8(8H,m), 4.2–4.4(1H,m),7.1–7.5(18H,m), 7.6–7.7(1H,m), 7.73(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine    was obtained.

IR(neat)cm⁻¹: 2943,1492,1449,1104,706 NMR(CDCl₃)δ values: 1.4–1.6(2H,m),2.3–2.4(2H,m), 2.5–2.7(2H,m), 2.95(2H,t,J=7 Hz), 3.0–3.1(2H,m),3.37(2H,t,J=7 Hz), 3.61(2H,t,J=7 Hz), 4.1–4.3(1H,m), 7.1–7.3(11H,m),7.3–7.5(7H,m), 7.6–7.7(1H,m), 7.77(1H,d,J=8 Hz)

EXAMPLE 100 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidineoxalate

In the same manner as in Example 93,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)-azetidineoxalate was obtained.

IR(KBr)cm⁻¹: 2866,1491,1451,1155,1110,704 NMR(DMSO-d₆)δ values:1.4–1.6(2H,m), 2.8–3.0(4H,m), 3.34(2H,t,J=6 Hz), 3.4–3.6(6H,m),4.2–4.4(1H,m), 7.23(1H,d,J=8 Hz), 7.3–7.5(16H,m), 7.6–7.8(2H,m),7.88(1H,d,J=8 Hz)

EXAMPLE 101 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-[(triethylsilyl)oxy]azetidine

-   (1) In the same manner as in Example 99 (1),    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-{3-[(triethylsilyl)oxy]-1-azetidinyl}-1-propanone    was obtained.

IR(neat)cm⁻: 2954,2875,1654,1458,1113,1004,750 NMR(CDCl₃)δ values:0.57(6H,q,J=8 Hz), 0.94(9H,t,J=8 Hz), 2.2–2.4(2H,m), 2.99(2H,t,J=7 Hz),3.6–3.9(5H,m), 3.9–4.0(1H,m), 4.1–4.3(2H,m), 4.4–4.6(1H,m),7.21(1H,dd,J=2,8 Hz), 7.29(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 88 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-[(triethylsilyl)oxy]azetidine    was obtained.

IR(neat)cm⁻¹: 2951,1380,1201,1114,865,747,701 NMR(CDCl₃)δ values:0.57(6H,q,J=8 Hz), 0.94(9H,t,J=8 Hz), 1.5–1.7(2H,m), 2.48(2H,t,J=7 Hz),2.7–2.8(2H,m), 2.99(2H,t,J=7 Hz), 3.46(2H,t,J=6 Hz), 3.5–3.7(2H,m),3.66(2H,t,J=7 Hz), 4.3–4.5(1H,m), 7.21(1H,dd,J=2,8 Hz),7.28(1H,dd,J=1,8), 7.41(1H,d,J=6 Hz), 7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

EXAMPLE 102 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(benzyloxy)azetidine

-   (1) In 8 mL of N,N-dimethylformamide was dissolved 1.00 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-(3-hydroxy-1-azetidinyl)-1-propanone,    and 1.90 g of silver(I) oxide and 0.97 mL of benzyl bromide were    added to the solution, after which the resulting mixture was stirred    at room temperature for 31 hours. The insoluble materials were    filtered off and water and ethyl acetate were added to the residue,    after which the organic layer was separated. The organic layer was    washed with a saturated aqueous sodium chloride solution, dried over    anhydrous magnesium sulfate, and then distilled under reduced    pressure to remove the solvent. The residue was purified by a column    chromatography (eluent; toluene:ethyl acetate=3:1 to 1:4) to obtain    1.00 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]-1-[3-(benzyloxy)-1-azetidinyl]-1-propanone    as an oil.

IR(neat)cm⁻¹: 2869,1654,1112,754,700 NMR(CDCl₃)δ values: 2.2–2.4(2H,m),2.98(2H,t,J=7 Hz), 3.6–3.8(4H,m), 3.8–3.9(1H,m), 3.9–4.0(1H,m),4.0–4.1(1H,m), 4.1–4.3(2H,m), 4.40(1H,d,J=12 Hz), 4.44(1H,d,J=12 Hz),7.20(1H,dd,J=1,8 Hz), 7.2–7.5(7H,m), 7.6–7.7(1H,m), 7.78(1H,d,J=8 Hz)

-   (2) In the same manner as in Example 1 (2),    1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(benzyloxy)azetidine    was obtained.

IR(neat)cm⁻¹: 2939,1355,1194,1110,754,700 NMR(CDCl₃)δ values:1.5–1.7(2H,m), 2.48(2H,t,J=7 Hz), 2.8–2.9(2H,m), 2.98(2H,t,J=7 Hz),3.46(2H,t,J=6 Hz), 3.5–3.7(2H,m), 3.65(2H,t,J=7 Hz), 4.1–4.3(1H,m),4.42(2H,s), 7.21(1H,dd,J=1,8 Hz), 7.2–7.4(6H,m), 7.41(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79 (1H,d,J=8 Hz)

EXAMPLE 103 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(benzyloxy)azetidineoxalate

In the same manner as in Example 93,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(benzyloxy)azetidineoxalate was obtained.

IR(KBr)cm⁻¹: 2859,1111,700 NMR(DMSO-d₆)δ values: 1.6–1.8(2H,m),2.92(2H,t,J=7 Hz), 3.06(2H,t,J=7 Hz), 3.42(2H,t,J=6 Hz), 3.62(2H,t,J=7Hz), 3.7–3.9(2H,m), 4.1–4.2(2H,m), 4.3–4.4(1H,m), 4.46(2H,s),7.26(1H,d,J=8 Hz), 7.3–7.5(6H,m), 7.7–7.8(2H,m), 7.90 (1H,d,J=8 Hz)

EXAMPLE 104 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine

In a mixture of 0.4 mL of toluene and 7 mL of a 50% (W/V) aqueous sodiumhydroxide solution was suspended 0.54 g of2-(1-benzothiophen-5-yl)-1-ethanol, followed by adding thereto 1.45 g of1-(3-chloropropyl)-3-(trityloxy)azetidine oxalate and 0.03 g oftetra-n-butylammonium bromide, and the resulting mixture was refluxedfor 7 hours. After the reaction mixture was cooled, water and toluenewere added thereto and the organic layer was separated. The organiclayer was washed with a saturated aqueous sodium chloride solution,dried over anhydrous magnesium sulfate, and then distilled under reducedpressure to remove the solvent. The residue was purified by a columnchromatography (eluent; chloroform:methanol=75:1) to obtain 0.59 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine as alight-yellow oil.

EXAMPLE 105 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidinemaleate

In the same manner as in Example 89,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)-azetidinemaleate was obtained.

IR(KBr)cm⁻¹: 3059,1346,1119,871,706 NMR(CDCl₃)δ values: 1.6–1.8(2H,m),2.8–3.0(4H,m), 3.1–3.3(2H,m), 3.40(2H,t,J=6 Hz), 3.63(2H,t,J=7 Hz),3.8–4.0(2H,m), 4.4–4.6(1H,m), 6.23(2H,s), 7.18(1H,d,J=8 Hz),7.2–7.5(17H,m), 7.64(1H,s), 7.79 (1H,d, J=8 Hz)

EXAMPLE 106 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(tetrahydro-2H-pyran-2-yloxy)azetidine

In the same manner as in Example 104,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(tetrahydro-2H-pyran-2-yloxy)azetidinewas obtained from 2-(1-benzothiophen-5-yl)-1-ethanol and1-(3-chloropropyl)-3-(tetrahydro-2H-pyran-2-yloxy)azetidine.

IR(neat)cm⁻¹: 2943,2853,1201,1115,1037,975,703 NMR(CDCl₃)δ values:1.4–1.9(8H,m), 2.49(2H,t,J=7 Hz), 2.8–3.0(2H,m), 2.98(2H,t,J=7 Hz),3.4–3.6(1H,m), 3.46(2H,t,J=6 Hz), 3.5–3.7(4H,m), 3.8–3.9(1H,m),4.2–4.4(1H,m), 4.5–4.6(1H,m), 7.21(1H,dd,J=2,8 Hz), 7.28(1H,dd,J=1,6Hz), 1.41(1H,d,J=6 Hz), 7.6–7.7(1H,m), 7.78(1H,d,J=8 Hz)

EXAMPLE 107 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalate

In 3.75 mL of dimethyl sulfoxide was dissolved 0.75 g of5-[2-(3-bromopropoxy)ethyl]-1-benzothiophene, and 0.63 g of sodiumhydrogencarbonate and 0.73 g of 3-azetidinyl=pivalate hydrochloride wereadded to the solution, after which the resulting mixture was stirred at70° C. for 4 hours. After the reaction mixture was cooled, 20 mL ofwater and 15 mL of ethyl acetate were added thereto and the organiclayer was separated. The organic layer was washed with water and then asaturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. The residue was purified by a column chromatography(eluent; toluene:ethyl acetate=1:1 to 1:5) to obtain 0.78 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalate as alight-yellow oil.

EXAMPLE 108 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine

In 15 mL of water was suspended 2.69 g of 3-(trityloxy)azetidinehydrochloride, and 20 mL of ethyl acetate was added thereto, after whichthe pH was adjusted to 9 with a 2 mol/l aqueous sodium hydroxidesolution and the organic layer was separated. The organic layer waswashed with water and then a saturated aqueous sodium chloride solution,dried over anhydrous magnesium sulfate, and then distilled under reducedpressure to remove the solvent. The resulting residue was dissolved in10 mL of dimethyl sulfoxide, and to the resulting solution were added0.80 g of sodium hydrogencarbonate and 2.00 g of3-[2-(1-benzothiophen-5-yl)ethoxy]propyl=methanesulfonate, followed bystirring at 50° C. for 3 hours. To the reaction mixture were added 20 mLof water and 20 mL of ethyl acetate, and the organic layer wasseparated. The organic layer was washed with water and then a saturatedaqueous sodium chloride solution, dried over anhydrous magnesiumsulfate, and then distilled under reduced pressure to remove thesolvent. The residue was purified by a column chromatography (eluent;toluene:ethyl acetate=3:1 to 1:3) to obtain 2.89 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine as alight-yellow oil.

EXAMPLE 109 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=acetate

In 15 mL of tetrahydrofuran was dissolved 1.50 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol, and 0.73 mLof acetic anhydride and 0.06 mL of a boron trifluoride-diethyl ethercomplex were added thereto under ice-cooling, after which the resultingmixture was stirred at room temperature for 1 hour. Ethyl acetate and asaturated aqueous sodium hydrogencarbonate solution were added to thereaction mixture and the organic layer was separated. The organic layerwas washed with water and then a saturated aqueous sodium chloridesolution, dried over anhydrous magnesium sulfate, and then distilledunder reduced pressure to remove the solvent. The residue was purifiedby a column chromatography (eluent; chloroform:methanol=100:1 to 50:1)to obtain 1.63 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=acetate as alight-yellow oil.

IR(neat)cm⁻¹: 2941,2859,1741,1375,1239,1109,756,703 NMR(CDCl₃)δ values:1.5–1.7(2H,m), 2.06(3H,s), 2.49(2H,t,J=7 Hz), 2.9–3.1(4H,m),3.46(2H,t,J=6 Hz), 3.5–3.7(2H,m), 3.66(2H,t,J=7 Hz), 4.9–5.1(1H,m),7.21(1H,dd,J=1,8 Hz), 7.28(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

EXAMPLE 110 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=acetateoxalate

In the same manner as in Example 93,1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=acetateoxalate was obtained.

IR(KBr)cm⁻¹: 2862,1745,1253,1108,711 NMR(DMSO-d₆)δ values:1.6–1.8(2H,m), 2.06(3H,s), 2.92(2H,t,J=7 Hz), 3.05(2H,t,J=7 Hz),3.43(2H,t,J=6 Hz), 3.62(2H,t,J=7 Hz), 3.8–4.0(2H,m), 4.2–4.3(2H,m),5.0–5.2(1H,m), 7.26(1H,dd,J=1,8 Hz), 7.40(1H,d,J=6 Hz), 7.7–7.8(2H,m),7.91(1H,d,J=8 Hz)

EXAMPLE 111 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate

In 2.6 mL of isopropanol was suspended 1.30 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=pivalatemaleate, and 2.1 mL of a 5 mol/L aqueous sodium hydroxide solution wasadded thereto at 20° C., after which the resulting mixture was stirredat room temperature for 6 hours. Water and ethyl acetate were added tothe reaction mixture, and the organic layer was separated and thenwashed successively with water and a saturated aqueous sodium chloridesolution. To the organic layer was added 0.29 g of maleic acid, and theresulting mixture was heated to effect dissolution, after which thesolvent was distilled off under reduced pressure. To the resultingresidue were added 5.2 mL of ethyl acetate and 1.3 mL of isopropanol,and the resulting mixture was stirred at room temperature for 30 minutesand then under ice-cooling for 1 hour. The crystals precipitated werecollected by filtration to obtain 0.76 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate ascolorless crystals.

EXAMPLE 112 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate

In 10 mL of isopropanol was suspended 2.00 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinyl=benzoatemaleate, and 7.82 mL of a 2 mol/L aqueous sodium hydroxide solution wasadded thereto, after which the resulting mixture was stirred at roomtemperature for 1 hour. Water and ethyl acetate were added to thereaction mixture and the organic layer was separated. The organic layerwas washed with water and then a saturated aqueous sodium chloridesolution, dried over anhydrous magnesium sulfate, and then distilledunder reduced pressure to remove the solvent. To the residue was added0.43 g of maleic acid, and crystallization from ethylacetate-isopropanol (4:1, 10 mL) was carried out to obtain 1.29 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate ascolorless crystals.

EXAMPLE 113 Production of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate

In 4 mL of chloroform was dissolved 0.83 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-(trityloxy)azetidine, and1.66 mL of a 4.75 mol/L dried hydrogen chloride-ethanol solution wasadded thereto, after which the resulting mixture was stirred at roomtemperature for 6 hours. Water and chloroform were added to the reactionmixture and the aqueous layer was separated. Ethyl acetate was added tothe aqueous layer and the pH was adjusted to 10 with a 5 mol/L aqueoussodium hydroxide solution, after which the organic layer was separated.The organic layer was washed with water and then a saturated aqueoussodium chloride solution, dried over anhydrous magnesium sulfate, andthen distilled under reduced pressure to remove the solvent. To theresidue was added 0.11 g of maleic acid, and crystallization from ethylacetate-isopropanol (4:1, 5 mL) was carried out to obtain 0.33 g of1-{3-[2-(1-benzothiophen-5-yl)ethoxy]propyl}-3-azetidinol maleate ascolorless crystals.

REFERENCE EXAMPLE 1 Production of3-[2-(1-benzothiophen-4-yl)ethoxy]-1-propanol

In a mixture of 2.2 mL of toluene and 8.8 mL of a 50% (W/V) aqueoussodium hydroxide solution was suspended 2.2 g of2-(1-benzothiophen-4-yl)-1-ethanol, followed by adding thereto 4.41 g of2-(3-chloropropoxy)tetrahydro-2H-pyran and 0.42 g oftetra-n-butylammonium hydrogensulfate, and the resulting mixture washeated under reflux for 2 hours. After the reaction mixture was cooled,water and toluene were added thereto and the organic layer wasseparated. The organic layer was washed with water and then a saturatedaqueous sodium chloride solution, and dried over anhydrous magnesiumsulfate. Then, the solvent was distilled off under reduced pressure toobtain 6.50 g of a mixture of2-{3-[2-(1-benzothiophen-4-yl)ethoxy]propoxy}tetrahydro-2H-pyran and2-(3-chloropropoxy)tetrahydro-2H-pyran as a light-brown oil.

In 8.0 mL of methanol was dissolved 6.50 g of this mixture, followed byadding thereto 8.0 mL of water and 0.70 g of p-toluenesulfonic acidmonohydrate, and the resulting mixture was stirred at room temperaturefor 12 hours. Ethyl acetate and a saturated aqueous sodiumhydrogencarbonate solution were added to the reaction mixture and theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. The residue was purified by a column chromatography(eluent; toluene:ethyl acetate=4:1 to 3:1) to obtain 1.42 g of3-[2-(1-benzothiophen-4-yl)ethoxy]-1-propanol as an oil.

IR(neat)cm⁻¹: 3394,2943,2867,1413,1110,761 NMR(CDCl₃)δ values:1.81(2H,qn,J=6 Hz), 2.1(1H,brs), 3.26(2H,t,J=7 Hz), 3.63(2H,t,J=6 Hz),3.69(2H,t,J=7 Hz), 3.76(2H,t,J=6 Hz), 7.0–7.4(2H,m), 7.45(2H,s),7.77(1H,dd,J=2,7 Hz)

REFERENCE EXAMPLE 2

The following compounds were obtained in the same manner as in ReferenceExample 1.

3-[2-(1-Benzothiophen-2-yl)ethoxy]-1-propanol

NMR(CDCl₃)δ values: 1.68(1H,brs), 1.86(2H,qn,J=6 Hz), 3.17(2H,t,J=6 Hz),3.67(2H,t,J=6 Hz), 3.76(4H,t,J=6 Hz), 7.07(1H,s), 7.2–7.4(2H,m),7.67(1H,d,J=8 Hz), 7.77(1H,d,J=8 Hz)

3-[2-(1-Benzothiophen-3-yl)ethoxy]-1-propanol

IR(neat)cm⁻¹: 3395,2942,2867,1427,1113,762,732 NMR(CDCl₃)δ values:1.83(2H,qn,J=6 Hz), 2.27(1H,t,J=6 Hz), 3.13(2H,t,J=7 Hz), 3.65(2H,t,J=6Hz), 3.74(2H,t,J=6 Hz), 3.78(2H,t,J=7 Hz), 7.18(1H,s), 7.34(1H,dt,J=1,7Hz), 7.39(1H,dt,J=1,7 Hz), 7.76(1H,dd,J=1,7 Hz), 7.86(1H,dd,J=1,7 Hz)

3-[2-(1-Benzothiophen-5-yl)ethoxy]-1-propanol

IR(neat)cm⁻¹: 3398,2939,2866,1438,1110,704 NMR(CDCl₃)δ values:1.82(2H,qn,J=6 Hz), 2.29(1H,t,J=6 Hz), 3.00(2H,t,J=7 Hz), 3.64(2H,t,J=6Hz), 3.71(2H,t,J=7 Hz), 3.73(2H,q,J=6 Hz), 7.22(1H,dd,J=1,8 Hz),7.28(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz), 7.66(1H,d,J=1 Hz), 7.80(1H,d,J=8Hz)

3-[2-(1-Benzothiophen-6-yl)ethoxy]-1-propanol

IR(neat)cm⁻¹: 3389,2942,2865,1397,1111,819,693 NMR(CDCl₃)δ values:1.82(2H,qn,J=6 Hz), 2.24(1H,t,J=6 Hz), 3.00(2H,t,J=7 Hz), 3.64(2H,t,J=6Hz), 3.71(2H,t,J=7 Hz), 3.74(2H,q,J=6 Hz), 7.21(1H,d,J=8 Hz),7.28(1H,d,J=5 Hz), 7.38(1H,d,J=5 Hz), 7.70(1H,s), 7.75 (1H,d,J=8 Hz)

3-[2-(1-Benzothiophen-7-yl)ethoxy]-1-propanol REFERENCE EXAMPLE 3Production of 4-[2-(3-chloropropoxy)ethyl]-1-benzothiophene

In 7.0 mL of methylene chloride was dissolved 1.40 g of3-[2-(1-benzothiophen-4-yl)ethoxy]-1-propanol, followed by addingthereto 1.10 mL of thionyl chloride and 0.05 mL ofN,N-dimethylformamide, and the resulting mixture was heated under refluxfor 5 hours. Then, the solvent was distilled off under reduced pressure.The residue was purified by a column chromatography (eluent;hexane:ethyl acetate=20:1) to obtain 1.43 g of4-[2-(3-chloropropoxy)ethyl]-1-benzothiophene as a yellow oil.

IR(neat)cm⁻¹: 2867,1413,1113,760 NMR(CDCl₃)δ values: 1.99(2H,qn,J=6 Hz),3.23(2H,t,J=7 Hz), 3.58(2H,t,J=6 Hz), 3.59(2H,t,J=6 Hz), 3.75(2H,t,J=7Hz), 7.18(1H,dd,J=2,7 Hz), 7.29(1H,t,J=7 Hz), 7.1–7.3(2H,m), 7.45(2H,s),7.76(1H,dd,J=2,8 Hz)

REFERENCE EXAMPLE 4

The following compounds were obtained in the same manner as in ReferenceExample 3.

2-[2-(3-Chloropropoxy)ethyl]-1-benzothiophene

NMR(CDCl₃)δ values: 2.04(2H,qn,J=6 Hz), 3.16(2H,t,J=7 Hz), 3.62(2H,t,J=6Hz), 3.66(2H,t,J=6 Hz), 3.75(2H,t,J=7 Hz), 7.06(1H,s), 7.25(1H,dt,J=1,7Hz), 7.30(1H,dt,J=1,7 Hz), 7.67(1H,dd,J=1,7 Hz), 7.77(1H,dd,J=1,7 Hz)

3-[2-(3-Chloropropoxy)ethyl]-1-benzothiophene

IR(neat)cm⁻¹: 2865,1427,1115,762,732 NMR(CDCl₃)δ values: 2.02(2H,qn,J=6Hz), 3.13(2H,t,J=7 Hz), 3.61(2H,t,J=6 Hz), 3.62(2H,t,J=6 Hz),3.79(2H,t,J=7 Hz), 7.19(1H,s), 7.34(1H,dt,J=1,7 Hz), 7.39(1H,dt,J=1,7Hz), 7.77(1H,dd,J=1,7 Hz), 7.86(1H,dd,J=1,7 Hz)

5-[2-(3-Chloropropoxy)ethyl]-1-benzothiophene

IR(neat)cm⁻¹: 2864,1438,1113,755,701 NMR(CDCl₃)δ values: 2.01(2H,qn,J=6Hz), 3.00(2H,t,J=7 Hz), 3.59(2H,t,J=6 Hz), 3.61(2H,t,J=6 Hz),3.70(2H,t,J=7 Hz), 7.22(1H,dd,J=1,8 Hz), 7.28(1H,d,J=5 Hz),7.42(1H,d,J=5 Hz), 7.68(1H,d,J=1 Hz), 7.79 (1H,d,J=8 Hz)

6-[2-(3-Chloropropoxy)ethyl]-1-benzothiophene

IR(neat)cm⁻¹: 2864,1113,820,761,695,652 NMR(CDCl₃)δ values:2.00(2H,qn,J=6 Hz), 3.00(2H,t,J=7 Hz), 3.58(2H,t,J=6 Hz.), 3.61(2H,t,J=6Hz), 3.70(2H,t,J=7 Hz), 7.21(1H,d,J=8 Hz), 7.28(1H,d,J=5 Hz),7.37(1H,d,J=5 Hz), 7.72(1H,s), 7.73(1H,d,J=8 Hz)

7-[2-(3-Chloropropoxy)ethyl]-1-benzothiophene

IR(neat)cm⁻¹: 2866,1460,1395,1115,795,701 NMR(CDCl₃)δ values:2.00(2H,qn,J=6 Hz), 3.17(2H,t,J=7 Hz), 3.60(4H,t,J=6 Hz), 3.82(2H,t,J=7Hz), 7.20(1H,d,J=8 Hz), 7.33(1H,t,J=8 Hz), 7.35(1H,d,J=5 Hz),7.42(1H,d,J=5 Hz), 7.70(1H,d,J=8 Hz)

REFERENCE EXAMPLE 5 Production of3-[2-(1-benzothiophen-5-yl)ethoxy]propyl=methanesulfonate

In 16.8 mL of methylene chloride was dissolved 2.03 g of3-[2-(1-benzothiophen-5-yl)ethoxy]-1-propanol, and to the solution wereadded 2.43 mL of methanesulfonyl chloride, 4.37 mL of triethylamine and0.10 g of 4-(dimethylamino)pyridine under ice-cooling, after which theresulting mixture was stirred at the same temperature for 30 minutes andthen at room temperature for 12 hours. Methylene chloride and water wereadded to the reaction mixture and the organic layer was separated. Theorganic layer was washed with water and then a saturated aqueous sodiumchloride solution, dried over anhydrous magnesium sulfate, and thendistilled under reduced pressure to remove the solvent. The residue waspurified by a column chromatography (eluent; hexane:ethyl acetate=5:1)to obtain 1.40 g of3-[2-(1-benzothiophen-5-yl)ethoxy]propyl=methanesulfonate.

IR(neat)cm⁻¹: 2937,2866,1352,1174,1114,943,705,529 NMR(CDCl₃)δ values:1.97(2H,qn, J=6 Hz), 2.81(3H,s), 2.98(2H,t,J=7 Hz), 3.54(2H,t,J=6 Hz),3.70(2H,t,J=6 Hz), 4.26(2H,t,J=7 Hz), 7.20(1H,dd,J=1,8 Hz),7.28(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz), 7.65(1H,d,J=1 Hz), 7.79(1H,d,J=8Hz)

REFERENCE EXAMPLE 6 Production of2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]acetic acid and2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]acetic acid

-   (1) Production of 2,4-dimethoxyphenethyl=acetate

In 150 mL of methylene chloride was dissolved 15.0 g of2-(2,4-dimethoxyphenyl)-1-ethanol, and to the solution were added 9.32mL of acetic anhydride, 13.8 mL of triethylamine and 0.10 g of4-(dimethylamino)-pyridine under ice-cooling, after which the resultingmixture was stirred at the same temperature for 30 minutes and then atroom temperature for 12 hours. Water was added to the reaction mixtureand the pH was adjusted to 1.5 with 6 mol/L hydrochloric acid, afterwhich the organic layer was separated. The organic layer was washed withwater and then a saturated aqueous sodium chloride solution, dried overanhydrous magnesium sulfate, and then distilled under reduced pressureto remove the solvent. The residue was purified by a columnchromatography (eluent; hexane ethyl acetate=5:1) to obtain 17.2 g of2,4-dimethoxyphenethyl=acetate as a colorless oil.

IR(neat)cm⁻¹: 2958,1736,1509,1243,1035,834 NMR(CDCl₃)δ values:2.03(3H,s), 2.87(2H,t,J=7 Hz), 3.80(6H,s), 4.22(2H,t,J=7 Hz),6.41(1H,d,J=9 Hz), 6.46(1H,s), 7.05(1H,d,J=9 Hz)

In the same manner as above, 2,5-dimethoxy-phenethyl=acetate wasobtained.

IR(neat)cm⁻¹: 2952,1736,1502,1226,1048,802,710 NMR(CDCl₃)δ values:2.01(3H,s), 2.90(2H,t,J=7 Hz), 3.74(3H,s), 3.76(3H,s), 4.25(2H,t,J=7Hz), 6.74(3H,s)

-   (2) Production of 5-acetyl-2,4-dimethoxyphenethyl=acetate

In 170 mL of methylene chloride was dissolved 17.0 g of2,4-dimethoxyphenethyl=acetate, and 5.93 mL of acetyl chloride and 12.1g of aluminum chloride were added to the solution under ice-cooling,after which the resulting mixture was stirred at the same temperaturefor 1 hour. The reaction mixture was poured into ice water and theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. Diisopropyl ether was added to the residue and the crystalsprecipitated were collected by filtration, washed with diisopropyl etherand then dried to obtain 13.9 g of5-acetyl-2,4-dimethoxy-phenethyl=acetate as yellow crystals.

NMR(CDCl₃)δ values: 2.01(3H,s), 2.57(3H,s), 2.88(2H,t,J=7 Hz),3.90(3H,s), 3.93(3H,s), 4.21(2H,t,J=7 Hz), 6.42(1H,s), 7.68(1H,s)

In the same manner as above, 4-acetyl-2,5-dimethoxyphenethyl=acetate wasobtained.

-   (3) Production of 5-acetyl-4-hydroxy-2-methoxy-phenethyl=acetate

In 70 mL of acetonitrile was dissolved 13.9 g of5-acetyl-2,4-dimethoxyphenethyl=acetate, and 13.9 g of aluminum chlorideand 7.82 g of sodium iodide were added to the solution underice-cooling, after which the resulting mixture was stirred at 50° C. for3 hours. The reaction mixture was poured into ice water and to theresulting mixture was added ethyl acetate, after which the organic layerwas separated. The organic layer was washed with water and then asaturated aqueous sodium chloride solution, and dried over anhydrousmagnesium sulfate. The solvent was distilled off under reduced pressureto obtain 13.3 g of 5-acetyl-4-hydroxy-2-methoxyphenethyl=acetate as ayellow oil.

In the same manner as above,4-acetyl-5-hydroxy-2-methoxyphenethyl=acetate was obtained.

-   (4) Production of    1-[2-hydroxy-5-(2-hydroxyethyl)-4-methoxyphenyl]-1-ethanone

In 30 mL of ethanol was dissolved 13.3 g of the aforesaid5-acetyl-4-hydroxy-2-methoxyphenethyl=acetate, and to the solution wasadded 21 mL of a 5 mol/L aqueous sodium hydroxide solution, after whichthe resulting mixture was stirred at room temperature for 17 hours.Water and ethyl acetate were added to the reaction mixture and the pHwas adjusted to 1 with 6 mol/L hydrochloric acid, after which theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. Diisopropyl ether was added to the residue, and thecrystals precipitated were collected by filtration, washed withdiisopropyl ether and then dried to obtain 8.30 g of1-[2-hydroxy-5-(2-hydroxyethyl)-4-methoxyphenyl]-1-ethanone as yellowcrystals.

In the same manner as above,1-[2-hydroxy-4-(2-hydroxyethyl)-5-methoxyphenyl]-1-ethanone wasobtained.

NMR(CDCl₃)δ values: 1.6–1.8(1H,m), 2.61(3H,s), 2.90(2H,t,J=7 Hz),3.8–4.1(2H,m), 3.84(3H,s), 6.84(1H,s), 7.06(1H,s), 11.98(1H,s)

-   (5) Production of    2-bromo-1-[2-hydroxy-5-(2-hydroxyethyl)-4-methoxyphenyl]-1-ethanone

In 100 mL of methylene chloride was dissolved 10.0 g of1-[2-hydroxy-5-(2-hydroxyethyl)-4-methoxyphenyl]-1-ethanone, and 2.94 mLof bromine was added dropwise to the solution, after which the resultingmixture was stirred at room temperature for 1 hour. The reaction mixturewas poured into ice water and the organic layer was separated. Theorganic layer was washed with water and then a saturated aqueous sodiumchloride solution, and dried over anhydrous magnesium sulfate. Thesolvent was distilled off under reduced pressure to obtain 16.4 g of2-bromo-1-[2-hydroxy-5-(2-hydroxyethyl)-4-methoxyphenyl]-1-ethanone as ayellow oil.

In the same manner as above,2-bromo-1-[2-hydroxy-4-(2-hydroxyethyl)-5-methoxyphenyl]-1-ethanone wasobtained.

IR(neat)cm⁻¹: 3376,2941,1644,1496,1243,1034,757,690 NMR(CDCl₃)δ values:1.5–1.8(1H,m), 2.91(2H,t,J=7 Hz), 3.8–4.1(2H,m), 3.85(3H,s) 4.40(2H,s),6.89(1H,s), 7.07(1H,s) 11.51(1H,s)

-   (6) Production of 2-(6-methoxy-1-benzofuran-5-yl)-1-ethanol

In 70 mL of methanol was dissolved 16.4 g of the aforesaid2-bromo-1-[2-hydroxy-5-(2-hydroxyethyl)-4-methoxyphenyl]-1-ethanone, and17.3 g of sodium acetate was added to the solution, after which theresulting mixture was heated under reflux for 5 minutes. After thereaction mixture was cooled, water and ethyl acetate were added theretoand the organic layer was separated. The organic layer was washed withwater and then a saturated aqueous sodium chloride solution, dried overanhydrous magnesium sulfate, and then distilled under reduced pressureto remove the solvent. The residue was dissolved in 150 mL of methanoland to the resulting solution was added 6.30 g of sodium borohydride insmall portions, after which the resulting mixture was stirred at roomtemperature for 1 hour. Then, the resulting solution was adjusted to pH1 with 6 mol/L hydrochloric acid and stirred at room temperature foranother 1 hour. The reaction mixture was concentrated under reducedpressure and water and ethyl acetate were added thereto, after which theorganic layer was separated. The organic layer was washed with water andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. The residue was purified by a column chromatography(eluent; hexane:ethyl acetate=4:1) to obtain 1.48 g of2-(6-methoxy-1-benzofuran-5-yl)-1-ethanol as light-yellow crystals.

NMR(CDCl₃)δ values: 1.79(1H,brs), 2.97(2H,t,J=7 Hz), 3.84(2H,t,J=7 Hz),3.86(3H,s), 6.66(1H,d,J=3 Hz), 7.03(1H,s), 7.35(1H,s), 7.51(1H,d,J=3 Hz)

In the same manner as above, 2-(5-methoxy-1-benzofuran-6-yl)-1-ethanolwas obtained.

NMR(CDCl₃)δ values: 2.04(1H,brs), 2.98(2H,t,J=6 Hz), 3.86(2H,t,J=6 Hz),3.86(3H,s), 6.68(1H,d,J=2 Hz), 7.02(1H,s), 7.31(1H,s), 7.55(1H,d,J=2 Hz)

-   (7) Production of 2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]acetic    acid

In a mixture of 7.0 mL of tert-butanol and 1.75 mL ofN,N-dimethylformamide was dissolved 1.75 g of2-(6-methoxy-1-benzofuran-5-yl)-1-ethanol, and 2.2 g of1-chloroacetylpiperidine and 1.54 g of potassium tert-butoxide wereadded to the solution under ice-cooling, after which the resultingmixture was stirred at the same temperature for 30 minutes and then atthe room temperature for 2 hours. Water and ethyl acetate were added tothe reaction mixture and the pH was adjusted to 1 with 6 mol/Lhydrochloric acid, after which the organic layer was separated. Theorganic layer was washed with water and then a saturated aqueous sodiumchloride solution, dried over anhydrous magnesium sulfate, and thendistilled under reduced pressure to remove the solvent. The residue wasdissolved in 10.5 mL of a 90% aqueous ethanol solution, followed byadding thereto 0.91 g of sodium hydroxide, and the resulting mixture washeated under reflux for 3 hours. After the reaction mixture was cooled,water and ethyl acetate were added thereto and the pH was adjusted to 1with 6 mol/L hydrochloric acid, after which the organic layer wasseparated. The organic layer was washed with water and then a saturatedaqueous sodium chloride solution, dried over anhydrous magnesiumsulfate, and then distilled under reduced pressure to remove thesolvent. Diisopropyl ether was added to the residue, and the crystalsprecipitated were collected by filtration, washed with diisopropyl etherand then dried to obtain 1.42 g of2-[2-(6-methoxy-1-benzofuran-5-yl)ethoxy]acetic acid as yellow crystals.

IR(neat)cm⁻¹: 2939,1734,1426,1252,1200,1148,1094, 1022,771 NMR(DMSO-d₆)δvalues: 2.88(2H,t,J=7 Hz), 3.64(2H,t,J=7 Hz), 3.82(3H,s), 4.01(2H,s),6.81(1H,d,J=2 Hz), 7.22(1H,s), 7.44(1H,s), 7.82 (1H,d, J=2 Hz)

In the same manner as above,2-[2-(5-methoxy-1-benzofuran-6-yl)ethoxy]acetic acid was obtained.

IR(neat)cm⁻¹: 2942,1731,1466,1431,1249,1132,1013, 955,832,760NMR(DMSO-d₆)δ values: 2.90(2H,t,J=7 Hz), 3.66(2H,t,J=7 Hz), 3.82(3H,s),4.02(2H,s), 6.86(1H,d,J=2 Hz), 7.15(1H,s), 7.46(1H,s), 7.88 (1H, d, J=2Hz)

REFERENCE EXAMPLE 7 Production of3-[2-(1-benzothiophen-5-yl)ethoxy]propionic acid

-   (1) To 4.60 g of 2-(1-benzothiophen-5-yl)-1-ethanol were added 29 mg    of potassium hydroxide, 83 mg of tetra-n-butylammonium bromide and    5.67 mL of tert-butyl acrylate, and the resulting mixture was    stirred at 45 to 50° C. for 2 hours. After the reaction mixture was    cooled, water and toluene were added thereto and the pH was adjusted    to 1 with 6 mol/L hydrochloric acid, and the organic layer was    separated. The organic layer was washed with water, dried over    anhydrous magnesium sulfate, and then distilled under reduced    pressure to remove the solvent. The residue was purified by a column    chromatography (eluent; hexane:ethyl acetate=5:1) to obtain 7.70 g    of tert-butyl 3-[2-(1-benzothiophen-5-yl)ethoxy]propionate as a    colorless oil.

IR(neat)cm⁻¹: 2978,2867,1729,1368,1159,1112,702 NMR(CDCl₃)δ values:1.43(9H,s), 2.49(2H,t,J=6 Hz), 2.99(2H,t,J=7 Hz), 3.70(2H,t,J=6 Hz),3.70(2H,t,J=7 Hz), 7.21(1H,dd,J=2,8 Hz), 7.27(1H,dd,J=1,5 Hz),7.41(1H,d,J=5 Hz), 7.6–7.7(1H,m), 7.78(1H,d,J=8 Hz)

-   (2) In 22.8 mL of toluene was dissolved 7.60 g of tert-butyl    3-[2-(1-benzothiophen-5-yl)ethoxy]propionate, and 94 mg of    p-toluenesulfonic acid monohydrate was added thereto, after which    the resulting mixture was refluxed for 6 hours. After the reaction    mixture was cooled, water and ethyl acetate were added thereto and    the organic layer was separated. The organic layer was dried over    anhydrous magnesium sulfate and distilled under reduced pressure to    remove the solvent. The residue was crystallized from a    toluene-cyclohexane mixture (1:4, 23 mL) to obtain 5.30 g of    3-[2-(1-benzothiophen-5-yl)ethoxy]propionic acid as light-red    crystals.

IR(KBr)cm⁻¹: 2860,1719,1273,1128,706 NMR(CDCl₃)δ values: 2.63(2H,t, J=6Hz), 3.00(2H,t,J=7 Hz), 3.73(2H,t,J=7 Hz), 3.74(2H,t,J=6 Hz),7.20(1H,dd,J=1,8 Hz), 7.28(1H,dd,J=1,5 Hz), 7.41(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

REFERENCE EXAMPLE 8 Production of3-[2-(1-benzothiophen-5-yl)ethoxy]propionic acid

-   (1) To 2.00 g of 2-(1-benzothiophen-5-yl)-1-ethanol were added 13 mg    of potassium hydroxide, 36 mg of tetra-n-butylammonium bromide and    1.11 mL of acrylonitrile, and the resulting mixture was stirred at    45° C. for 3 hours. After the reaction mixture was cooled, water and    ethyl acetate were added thereto and the pH was adjusted to 1 with 2    mol/L hydrochloric acid. The insoluble materials were removed and    then the organic layer was separated. The organic layer was washed    with water and then a saturated aqueous sodium chloride solution,    dried over anhydrous magnesium sulfate, and then distilled under    reduced pressure to remove the solvent. The residue was purified by    a column chromatography (eluent; hexane:ethyl acetate=3:1) to obtain    2.46 g of 3-[2-(1-benzothiophen-5-yl)ethoxy]propiono-nitrile as a    colorless oil.

IR(neat)cm⁻¹: 2870,2251,1114,757,704 NMR(CDCl₃)δ values: 2.58(2H,t,J=6Hz), 3.02(2H,t,J=7 Hz), 3.66(2H,t,J=6 Hz), 3.75(2H,t,J=7 Hz),7.22(1H,d,J=8 Hz), 7.29(1H,d,J=5 Hz), 7.42(1H,d,J=5 Hz), 7.68(1H,s),7.80 (1H,d, J=8 Hz)

-   (2) In 0.6 mL of acetic acid was dissolved 200 mg of    3-[2-(1-benzothiophen-5-yl)ethoxy]propiononitrile, followed by    adding thereto 0.4 mL of water and 0.184 mL of sulfuric acid, and    the resulting mixture was stirred at 90 to 100° C. for 1 hour. After    the reaction mixture was cooled, water and ethyl acetate were added    thereto and the organic layer was separated. The organic layer was    washed with water and then a saturated aqueous sodium chloride    solution, dried over anhydrous magnesium sulfate, and then distilled    under reduced pressure to remove the solvent. The residue was    purified by a column chromatography (eluent; toluene ethyl    acetate=3:1) to obtain 140 mg of    3-[2-(1-benzothiophen-5-yl)ethoxy]propionic acid as colorless    crystals.

REFERENCE EXAMPLE 9 Production of3-[2-(1-benzothiophen-5-yl)ethoxy]-1-propanol

In 8 mL of tetrahydrofuran was dissolved 2.00 g of3-[2-(1-benzothiophen-5-yl)ethoxy]-1-propionic acid, and 1.31 mL oftriethylamine was added thereto. Then, the resulting solution was cooledto −25° C., after which a solution of 0.88 mL of ethyl chloroformate in2 mL of tetrahydrofuran was added dropwise thereto, and the resultingmixture was stirred at 5° C. for 1 hour. To the reaction mixture wereadded 15 mL of ethyl acetate and 10 mL of a saturated aqueous sodiumchloride solution, and the organic layer was separated. After theorganic layer was cooled to 5° C., 0.36 g of sodium borohydride wasadded thereto and the resulting mixture was stirred at room temperaturefor 1 hour. To the reaction mixture were added 20 mL of water and 10 mLof ethyl acetate, and the organic layer was separated. The organic layerwas washed successively with a 1 mol/L aqueous sodium hydroxidesolution, water and a saturated aqueous sodium chloride solution, andthen dried over anhydrous magnesium sulfate. The solvent was distilledoff under reduced pressure to obtain 1.89 g of3-[2-(1-benzothiophen-5-yl)ethoxy]-1-propanol as a yellow oil.

REFERENCE EXAMPLE 10 Production of5-[2-(3-bromopropoxy)ethyl]-1-benzothiophene

In 40 mL of methylene chloride was dissolved 2.00 g of3-[2-(1-benzothiophen-5-yl)ethoxy]-1-propanol, and 5.55 g oftriphenylphosphine was added to the solution, after which a solution of8.42 g of carbon tetrabromide in 10 mL of methylene chloride was addeddropwise thereto under ice-cooling and the resulting mixture was stirredat room temperature for 20 minutes. To the reaction mixture was added 20mL of water, and the organic layer was separated. The organic layer waswashed with a saturated aqueous sodium hydrogencarbonate solution andthen a saturated aqueous sodium chloride solution, dried over anhydrousmagnesium sulfate, and then distilled under reduced pressure to removethe solvent. Diethyl ether was added to the residue and the insolublematerials were filtered off, after which the solvent was distilled offunder reduced pressure. The residue was purified by a columnchromatography (eluent; hexane:ethyl acetate=20:1 to 10:1) to obtain1.93 g of 5-[2-(3-bromopropoxy)ethyl]-1-benzothiophene as a colorlessoil.

IR(neat)cm⁻¹: 2863,1437,1112,1051,701 NMR(CDCl₃)δ values: 2.0–2.2(2H,m),3.00(2H,t,J=7 Hz), 3.48(2H,t,J=6 Hz), 3.58(2H,t,J=6 Hz), 3.70(2H,t,J=7Hz), 7.22(1H,dd,J=1,8 Hz), 7.28(1H,dd,J=1,5 Hz), 7.42(1H,d,J=5 Hz),7.6–7.7(1H,m), 7.79(1H,d,J=8 Hz)

REFERENCE EXAMPLE 11 Production of 3-azetidinyl=pivalate hydrochloride

-   (1) In a mixture of 200 mL of toluene and 100 mL of tert-butanol was    dissolved 50.0 g of 1-[(1R)-1-phenylethyl]azetidin-3-ol, and 41.2 g    of potassium tert-butoxide was added thereto in small portions under    ice-cooling, after which the resulting mixture was stirred at the    same temperature for 1.5 hours. Under ice-cooling, 41.7 mL of    pivaloyl chloride was added dropwise to the reaction mixture and    stirred at the same temperature for 30 minutes. The reaction mixture    was poured into 300 mL of water and the insoluble materials were    filtered off, after which the organic layer was separated. The    organic layer was washed with water and then a saturated aqueous    sodium chloride solution, dried over anhydrous magnesium sulfate,    and then distilled under reduced pressure to remove the solvent. The    oil thus obtained was dissolved in 200 mL of ethyl acetate, and 258    mL of a 1.15 mol/L dried hydrogen chloride-ethyl acetate solution    was added thereto at 10° C. and stirred at the same temperature for    20 minutes. The crystals precipitated were collected by filtration    to obtain 70.8 g of 1-[(1R)-1-phenylethyl]-3-azetidinyl=pivalate    hydrochloride as colorless crystals.

IR(KBr)cm⁻¹: 2963,2509,2436,1731,1284,1161,699 NMR(DMSO-d₆)δ values:1.16(9H,s), 1.49(3H,d,J=7 Hz), 3.6–4.3(3H,m), 4.4–4.7(2H,m),4.9–5.2(1H,m), 7.3–7.5(3H,m), 7.6–7.7(2H,m)

-   (2) To a solution of 50.0 g of    1-[(1R)-1-phenylethyl]-3-azetidinyl=pivalate hydrochloride in 250 mL    of ethanol was added 5 g of 10% palladium-activated carbon, and the    resulting mixture was stirred for 9 hours at 50° C. and atmospheric    pressure under a hydrogen atmosphere. After cooling, the insoluble    materials were filtered off and the solvent was distilled off under    reduced pressure. A mixture of ethyl acetate and hexane (1:2) was    added to the residue and the crystals precipitated were collected by    filtration to obtain 23.1 g of 3-azetidinyl=pivalate hydrochloride    as colorless crystals.

IR(KBr)cm⁻¹: 2988,1718,1156,877,789 NMR(CDCl₃)δ values: 1.23(9H,s),4.0–4.2(2H,m), 4.3–4.5(2H,m), 5.2–5.4(1H,m)

REFERENCE EXAMPLE 12 Production of 3-(trityloxy)azetidine hydrochloride

-   (1) In 50 mL of methylene chloride was dissolved 10.0 g of    1-(3-hydroxy-1-azetidinyl)-1-ethanone, and 31.2 mL of    1.8-diazabicyclo[5,4,0]undec-7-ene and 29.1 g of trityl chloride    were added thereto under ice-cooling, after which the resulting    mixture was stirred at room temperature for 1 hour. The reaction    mixture was poured into 100 mL of ice water and the organic layer    was separated. The organic layer was washed with diluted    hydrochloric acid, water and a saturated aqueous sodium chloride    solution, dried over anhydrous magnesium sulfate, and then distilled    under reduced pressure to remove the solvent. Diisopropyl ether was    added to the residue and the crystals precipitated were collected by    filtration to obtain 21.7 g of    1-[3-(trityloxy)-1-azetidinyl]-1-ethanone as light-yellow crystals.

IR(KBr)cm⁻¹: 1646,1450,1124,750,711 NMR(CDCl₃)δ values: 1.74(3H,s),3.6–3.8(4H,m), 4.4–4.5(1H.m), 7.2–7.5(15H,m)

-   (2) In 88 mL of methanol was suspended 22.0 g of    1-[3-(trityloxy)-1-azetidinyl]-1-ethanone, followed by adding    thereto 66 mL of a 5 mol/L aqueous sodium hydroxide solution, and    the resulting mixture was refluxed for 9 hours. The reaction mixture    was distilled under reduced pressure to remove the solvent, and 110    mL of water and 220 mL of ethyl acetate were added to the residue,    after which the organic layer was separated. The organic layer was    washed with water and then a saturated aqueous sodium chloride    solution, dried over anhydrous magnesium sulfate, and then distilled    under reduced pressure to remove the solvent. The oil thus obtained    was dissolved in 154 mL of ethyl acetate, and to the resulting    solution was added 25 mL of a 2.95 mol/L dried hydrogen    chloride-ethyl acetate solution, after which the resulting mixture    was stirred at room temperature. The crystals precipitated were    collected by filtration to obtain 13.7 g of 3-(trityloxy)azetidine    hydrochloride as colorless crystals.

IR(KBr)cm⁻¹: 2900,2620,1447,751,700 NMR(DMSO-d₆)δ values: 3.4–3.6(4H,m),4.3–4.5(1H,m), 7.2–7.5(15H,m)

REFERENCE EXAMPLE 13 Production of3-(tetrahydro-2H-pyran-2-yloxy)azetidine hydrochloride

-   (1) In 10 mL of methylene chloride was dissolved 1.00 g of    1-(3-hydroxy-1-azetidinyl)-1-ethanone, and 1.19 mL of    3,4-dihydro-2H-pyran and 0.08 g of p-toluenesulfonic acid    monohydrate were added to the solution, after which the resulting    mixture was stirred overnight at room temperature. To the reaction    mixture was added 10 mL of water and the pH was adjusted to 8 with a    saturated aqueous sodium hydrogencarbonate solution, after which the    organic layer was separated. The organic layer was dried over    anhydrous magnesium sulfate and distilled under reduced pressure to    remove the solvent. The residue was purified by a column    chromatography (eluent; chloroform˜chloroform:methanol=25:1) to    obtain 1.79 g of    1-[3-(tetrahydro-2H-pyran-2-yloxy)-1-azetidinyl]-1-ethanone as a    yellow oil.

IR(neat)cm⁻¹: 2945,2875,1654,1458,1138,1036,971 NMR(CDCl₃)δ values:1.5–1.9(6H,m), 1.87(3H,s) 3.4–3.6(1H,m), 3.8–4.4(5H,m), 4.5–4.7(2H,m)

-   (2) In the same manner as in Reference Example 12 (2),    3-(tetrahydro-2H-pyran-2-yloxy)azetidine hydrochloride was obtained    from 1-[3-(tetrahydro-2H-pyran-2-yloxy)-1-azetidinyl]-1-ethanone.

IR(KBr)cm⁻¹: 2956,2627,1036,976,915 NMR(DMSO-d₆)δ values: 1.4–1.8(6H,m),3.3–3.5(1H,m), 3.7–4.2(5H,m), 4.4–4.7(2H,m)

REFERENCE EXAMPLE 14 Production of1-(3-chloropropyl)-3-(trityloxy)azetidine oxalate

-   (1) In 5 mL of dimethyl sulfoxide was dissolved 0.50 g of    3-(trityloxy)azetidine hydrochloride, and to the solution were added    0.49 g of potassium carbonate, 0.35 g of potassium iodide and 0.22    mL of 1-bromo-3-chloropropane, after which the resulting mixture was    stirred at room temperature for 2 hours. To the reaction mixture    were added 15 mL of water and 10 mL of ethyl acetate, and the    organic layer was separated. The organic layer was washed with water    and then a saturated aqueous sodium chloride solution, and dried    over anhydrous magnesium sulfate. The solvent was distilled off    under reduced pressure to obtain    1-(3-chloropropyl)-3-(trityloxy)azetidine.-   (2) In 10 mL of ethyl acetate was dissolved    1-(3-chloropropyl)-3-(trityloxy)azetidine, and to the resulting    solution was added 0.15 g of oxalic acid, after which the resulting    mixture was stirred at room temperature. The crystals precipitated    were collected by filtration to obtain 0.39 g of    1-(3-chloropropyl)-3-(trityloxy)azetidine oxalate.

IR(KBr)cm⁻¹: 3033,1491,1449,1139,706 NMR(DMSO-d₆)δ values:1.7–1.9(2H,m), 3.0–3.1(2H,m), 3.5–3.7(6H,m), 4.3–4.5(1H,m),7.2–7.4(15H,m)

REFERENCE EXAMPLE 15

Production of1-(3-chloropropyl)-3-(tetrahydro-2H-pyran-2-yloxy)azetidine

In the same manner as in Reference Example 14 (1),1-(3-chloropropyl)-3-(tetrahydro-2H-pyran-2-yloxy)azetidine was obtainedfrom 3-(tetrahydro-2H-pyran-2-yloxy)azetidine hydrochloride.

IR(neat)cm⁻¹: 2943,2834,1203,1038,975,914,871 NMR(CDCl₃)δ values:1.4–1.8(6H,m), 1.8–1.9(2H,m), 2.59(2H,t,J=7 Hz), 2.8–3.0(2H,m),3.4–3.5(1H,m), 3.57(2H,t,J=7 Hz), 3.6–3.7(2H,m), 3.8–3.9(1H,m),4.3–4.4(1H,m), 4.5–4.6(1H,m)

TEST EXAMPLE 1

[Activity to Accelerate Neurite Outgrowth]

PC12 cells [rat adrenomedullary chromaffinoma (NGF responders)] werecultured in an incubator (5% CO₂, 37° C.) by using RPMI1640 medium(available from Nissui Pharmaceutical Co., Ltd.) containing 5% heatinactivated (56° C., 30 minutes) horse serum (available fromBio-Whittaker Inc.), 5% heat inactivated (56° C., 30 minutes) fetal calfserum (available from Sigma Chemical Co.) and 25 μg/ml gentamicin(available from GIBCO BRL).

The cultured PC12 cells were incubated at 37° C. for 30 minutes inphosphate-buffered physiological saline containing 1 mM EDTA, to bedetached from a culture flask. The concentration of the cultured PC12cells was adjusted to 5×10⁴ cells/mL with RPMI1640 medium containing1.5% heat inactivated horse serum, 1.5% heat inactivated fetal calfserum and 25 μg/ml gentamicin, and the resulting cell suspension wasdispensed in 2 ml portions into 35-mm tissue culture dishes (mfd. byFalcon Inc.) coated with 0.01% polyornithine [dissolved in 150 mM boratebuffer (pH 8.4)]. Then, 2.5s-NGF (available from Wako Pure ChemicalIndustries, Ltd.) [dissolved in phosphate-buffered physiological salinecontaining 0.1% bovine serum albumin] and each test compound were addedto the medium at the same time so as to adjust their finalconcentrations to 40 ng/mL and 10 μM, respectively, followed byculturing under conditions of 5% CO₂ and 37° C. After 48 hours of theculturing, cells were fixed in a 10% neutral formalin solution for 30minutes, washed with phosphate-buffered physiological saline anddistilled water, and then dried. Any four fields of view were selectedunder a phase contrast microscope, and 50 or more cells were observed ineach field of view. The percentage of the number of cells having anneutrite extended to a length longer than the diameter of the cell bodyrelative to the total number of cells observed (neutrite outgrowth rate)was calculated.

The activity to accelerate neutrite outgrowth was calculated accordingto the following expression as a neutrite outgrowth acceleration rateattained by the addition of each test compound, by taking a neutriteoutgrowth rate due to NGF as 100%:

(neutrite outgrowth rate attained by addition of each testcompound)/(neutrite outgrowth rate due to NGF)×100(%)

As a result, the neutrite outgrowth acceleration rate was found to be asfollows: the compound of Example 2: 265%, the compound of Example 6:300%, the compound of Example 12: 299%, the compound of Example 14:207%, the compound of Example 29: 212%, the compound of Example 51:216%, the compound of Example 59: 241%, the compound of Example 69:233%, the compound of Example 71: 183%, the compound of Example 74:246%, the compound of Example 80: 190%, and the compound of Example 81:190%.

TEST EXAMPLE 2

[Activity to Accelerate Nerve Regeneration]

The test was carried out according to the method described in J.Pharmaco. Exp. Ther., Vol. 290, page 348 (1999) and Neuroscience, vol.88, page 257 (1999).

SD strain rats (male, aged 6 to 7 weeks, and weighing 170 to 280 g) wereanesthetized with pentobarbital, and the left sciatic nerve of each ratwas exposed in the femoral region, separated from the surroundingconnective tissue, and then cut at a distal position which was about 1cm apart from the gluteus. The ends of the nerve were inserted into asterilized silicone tube with a length of 8 mm (inside diameter 1.3 mm,and outside diameter 1.8 mm) to a depth of 3.5 mm so that a space of 1mm might be formed in the middle of the tube. The ends of the nerve werefixed and the nerve was put back to the muscular tissue together withthe tube, after which the incised part was sutured. On the seventh day,each test compound dissolved in distilled water was orally administeredin a dose of 1 mg/kg, and thereafter the test compound was administeredonce a day for 13 days in the same manner as above.

Twenty-one days after cutting the nerve, the sciatic nerve was exposedagain under pentobarbital anesthesia, and the nerve in the femoralregion and the crural region was separated from the surroundingconnective tissues, after which the silicone tube at the cut part wasremoved. A stimulation electrode was set on the proximal side withrespect to the cut position, and a recording electrode was set at themost distal position in the crural region. An electric stimulus(voltage: 2 V, delay: 1 msec, and duration: 100 μsec) was given, and anaction potential induced by the stimulus was recorded. The recordingelectrode was gradually moved toward the proximal, and the distancebetween the cut position and the most distal position at which an actionpotential had been obtained was measured as regeneration distance. Onlydistilled water was administered to a control group.

The sciatic nerve regeneration rate of the test compound was calculatedaccording to the following expression:

(regeneration distance of drug-treated group)/(regeneration distance ofcontrol group)×100(%)

As a result, the sciatic nerve regeneration rate was found to be asfollows: the compound of Example 4: 167%, the compound of Example 10:186%, the compound of Example 12: 142%, the compound of Example 14:150%, the compound of Example 31: 155%, and the compound of Example 33:161%.

TEST EXAMPLE 3

[Activity to Inhibit the Neuronal Death Induced by Aβ]

Inhibitory effect on the death of cultured neurons induced by Aβ wasinvestigated by modifying the method described in Brain Res., vol. 639,page 240 (1994).

Cerebral cortices isolated from the brains of embryos (aged 17 to 19days) of Wistar strain rats were sliced, and then neurons weredissociated by trypsin treatment. The cells were seeded into a 48-welltissue culture plate at a density of 1×10⁵ cells per well and culturedunder conditions of 5% CO₂ and 37° C. on Dulbecco's modified Eagle'smedium added B27 supplement (available from GIBCO BRL) and 3.6 mg/mLglucose.

On the 12th to 13th day of the culture, a potassium chloride solutionwas added to the medium to adjust the final concentration of potassiumchloride to 25 mmol/L. Immediately after this addition, each testcompound was added to the medium. After 24 hours, Aβ (a peptidescomprising 25 to 35 residues) dissolved in distilled water was added tothe medium at a final concentration of 20 μmol/L. After another 24hours, the medium was replaced with Dulbecco's modified Eagle's mediumadded B27 supplement and 3.6 mg/mL glucose and test compound.

The inhibitory activity of the test compound against the death ofcultured neurons was determined by inhibition against the decrease ofreducing ability of MMT. That is, MTT assay [J. Immuno. Methods, vol.65, page 55 (1983)] developed by Mosmann was carried out 48 hours afterthe medium replacement, and the inhibition rate (%) of the test compoundagainst a decrease of a MTT assay value induced by Aβ was calculated.

Inhibition rate=[(MTT assay value of a group treated with Aβ and thedrug)−(MTT assay value of a group treated with Aβ)]/[MTT assay value ofan untreated group−MTT assay value of a group treated with Aβ]×100(%).

As a result, the inhibition rate at a concentration of 1 μM was found tobe as follows: the compound of Example 4: 63%, the compound of Example6: 48%, the compound of Example 10: 42%, the compound of Example 14:48%, the compound of Example 31: 50%, the compound of Example 33: 54%,the compound of Example 61: 52%, the compound of Example 69: 70%, thecompound of Example 74: 50%, and the compound of Example 80: 75%.

TEST EXAMPLE 4

[Metabolism in Human Liver Microsomes]

In a test tube were placed 50 μL of 100 mmol/L potassium phosphatebuffer (pH 7.4) and 25 μL of 3 mg protein/mL pooled human livermicrosomes (available from Gentest Inc.), and a solution prepared byblending 10 μL of 66 mmol/L sodium glucose 6-phosphate, 10 μL of 10units/mL glucose 6-phosphate dehydrogenase, 10 μL of 26 mmol/Lnicotinamide adenine dinucleotide phosphate oxidized form, 10 μL of 66mmol/L magnesium chloride and 135 μL of 100 mmol/L potassium phosphatebuffer (pH 7.4) was added thereto, followed by preincubation for 5minutes. Thereto was added 50 μL of each test compound to aconcentration of 6 μmol/L to initiate the reaction, and incubation wascarried out at 37° C. for 60 minutes (final volume: 300 μL). Thereaction was terminated by the addition of 600 μL of acetonitrile,followed by centrifugation at 12000×g and at 4° C. for 15 minutes. Thesupernatant was separated, concentrated by centrifugation under reducedpressure, and then subjected to high performance liquid chromatography,and the amount of the residual test compound after the metabolicreaction was determined.

The residual rate was calculated by the following equation:Residual rate (%)=[(peak area due to the test compound after 60 minutesof the reaction)/(peak area due to the test compound in the case ofstopping the reaction by adding acetonitrile simultaneously with theaddition of the test compound after the preincubation)]×100

As a result, the residual rate was found to be as follows: the compoundof Example 4: 80%, the compound of Example 10: 70%, the compound ofExample 12: 83%, the compound of Example 14: 75%, the compound ofExample 61: 74%, the compound of Example 69: 74%, the compound ofExample 71: 80%, and the compound of Example 74: 71%.

INDUSTRIAL APPLICABILITY

The alkyl ether derivative of the general formula [1] or salt thereof ofthe present invention has excellent activity to accelerate neuriteoutgrowth, activity to accelerate nerve regeneration and activity toprotect neurons, is excellent also in stability to metabolism, and isuseful as a therapeutic agent for diseases in central and peripheralnerves.

1. An alkyl ether represented by the formula, or its salts:

wherein each of R¹ and R², which may be the same or different,represents one or more groups selected from the group consisting of ahydrogen atom, a halogen atom, a substituted or unsubstituted alkyl,aryl, aralkyl, alkoxy, aryloxy, alkylthio, arylthio, alkenyl,alkenyloxy, amino, alkylsulfonyl, arylsulfonyl, carbamoyl, a protectedor unprotected amino, hydroxyl or carboxyl group, a nitro group, and anoxo group; R³ is a substituted or unsubstituted alkylamino group, or aprotected or unprotected amino or hydroxyl group; the ring A isthiophene; each of m and n is an integer of 1 to 6; and p is an integerof
 1. 2. The alkyl ether or its salts according to claim 1, wherein theportion represented by:

in the general formula in claim 1 is;


3. The alkyl ether or its salts according to claim 1, wherein R¹ is ahydrogen atom; and R² is a hydrogen atom, a halogen atom or an alkoxygroup.
 4. The alkyl ether or its salts according to claim 1, wherein mis 2, n is an integer of 2 to 3, and p is an integer of
 1. 5. A processfor producing an alkyl ether represented by the formula:

wherein R³ is a substituted or unsubstituted alkylamino group, or aprotected or unprotected amino or hydroxyl group; and R¹ , R², the ringA, m, n and p are as defined below, or its salt, which comprisesreacting a carboxylic acid represented by the formula:

wherein each of R¹ and R², which may be the same or different,represents one or more groups selected from a hydrogen atom, a halogenatom, a substituted or unsubstituted alkyl, aryl, aralkyl, alkoxy,aryloxy, alkylthio, arylthio, alkenyl, alkenyloxy, amino, alkylsulfonyl,arylsulfonyl, carbamoyl, a protected or unprotected amino, hydroxyl orcarboxyl group, a nitro group, and an oxo group; the ring A isthiophene; and each of m and n is an integer of 1 to 6, or its salt,with a compound represented by the formula:

wherein R^(3a) is a dialkylamino group, a protected monoalkylaminogroup, a protected amino group or a protected or unprotected hydroxylgroup; and p is an integer of 1, or its salt to obtain an alkylamiderepresented by the formula:

wherein R¹, R², R^(3a), the ring A, m, n and p are as defined above, orits salt, optionally subjecting the alkylamide or salt thereof to ahydroxyl group protection reaction in the case of R^(3a) being ahydroxyl group, to obtain an alkylamide in which R^(3a) is a protectedhydroxyl group, or its salt, and then subjecting the obtained alkylamideto reduction reaction.
 6. A process for producing an alkyl etherrepresented by the formula:

wherein R¹, R², R^(3a), the ring A, m, n and p are as defined below, orits salt, which comprises reacting an ether represented by the formula:

wherein each of R¹ and R², which may be the same or different,represents one or more groups selected from a hydrogen atom, a halogenatom, a substituted or unsubstituted alkyl, aryl, aralkyl, alkoxy,aryloxy, alkylthio, arylthio, alkenyl, alkenyloxy, amino, alkylsulfonyl,arylsulfonyl, carbamoyl, a protected or unprotected amino, hydroxyl orcarboxyl group, a nitro group, and an oxo group; the ring A isthiophene; X¹ is a leaving group; and each of m and n is an integer of 1to 6, or its salt with a carboxylic acid represented by the formula:

wherein R^(3a) is a dialkylamino group, a protected monoalkylaminogroup, a protected amino group or a protected or unprotected hydroxylgroup; and p is an integer of 1, or its salt.
 7. A process for producingan alkyl ether represented by the formula:

wherein R¹ , R², R^(3b), the ring A, m, n and p are as defined below, orits salt, which comprises reacting an alcohol represented by theformula:

wherein each of R¹ and R², which may be the same or different,represents one or more groups selected from a hydrogen atom, a halogenatom, a substituted or unsubstituted alkyl, aryl, aralkyl, alkoxy,aryloxy, alkylthio, arylthio, alkenyl, alkenyloxy, amino, alkylsulfonyl,arylsulfonyl, carbamoyl, a protected or unprotected amino, hydroxyl orcarboxyl group, a nitro group, and an oxo group; the ring A isthiophene; and m is an integer of 1 to 6, or its salt, with an N-alkylcyclic amino represented by the formula:

wherein R^(3b) is a dialkylamino group, a protected monoalkylaminogroup, a protected amino group or a protected hydroxyl group; X² is aleaving group; n is an integer of 1 to 6; and p is an integer of
 1. 8. Apharmaceutical composition which comprises an alkyl ether represented bythe formula below, or its pharmacologically acceptable salt:

wherein each of R¹ and R², which may be the same or different,represents one or more groups selected from a hydrogen atom, a halogenatom, a substituted or unsubstituted alkyl, aryl, aralkyl, alkoxy,aryloxy, alkylthio, arylthio, alkenyl, alkenyloxy, amino, alkylsulfonyl,arylsulfonyl, carbamoyl, a protected or unprotected amino, hydroxyl orcarboxyl group, a nitro group, and an oxo group; R³ is a substituted orunsubstituted alkylamino group, or a protected or unprotected amino orhydroxyl group; the ring A is thiophene; each of m and n is an integerof 1 to 6; and p is an integer of
 1. 9. The alkyl ether or its saltsaccording to claim 2, wherein R¹ is a hydrogen atom; and R² is ahydrogen atom, a halogen atom or an alkoxy group.
 10. The alkyl ether orits salts according to claim 2, wherein m is 2, n is an integer of 2 to3, and p is an integer of
 1. 11. The alkyl ether or its salts accordingto claim 3, wherein m is 2, n is an integer of 2 to 3, and p is aninteger of 1.